Temperature=0.7
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3 items • Updated
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
hep-ph/0402124 | Emmanuel Lipmanov | E. M. Lipmanov | Small Q-D neutrino masses from a generic lepton mass hierarchy | 8 pages, no figures. Revised version. Results unchanged | null | null | null | hep-ph | null | Exponential lepton mass ratios are studied in a low energy phenomenology. In
view of the known data, the mass patterns of the charged leptons and widely
discussed quasi-degenerate neutrinos are related to one another by two
different traits - opposite mass ratios with large versus small exponents, and
probably confor... | [
{
"created": "Wed, 11 Feb 2004 19:37:12 GMT",
"version": "v1"
},
{
"created": "Tue, 16 Mar 2004 16:20:21 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Lipmanov",
"E. M.",
""
]
] | Exponential lepton mass ratios are studied in a low energy phenomenology. In view of the known data, the mass patterns of the charged leptons and widely discussed quasi-degenerate neutrinos are related to one another by two different traits - opposite mass ratios with large versus small exponents, and probably conforma... | Exponential lepton mass ratios are studied in a low energy phenomenology. In view of the known data, the mass patterns of the charged leptons and widely discussed quasi-degenerate neutrinos are related to one another by two different traits - opposite mass ratios with large versus small exponents, and probably conforma... | A general generic hierarchy equation with two opposite solutions respectively for the charged lepton and neutrino mass ratios is considered. It determines a small upper bound on the Q-D neutrino mass scale, with estimations: m = 0.30 eV at 90% C.L., and m = 0.18 eV at best-fit mass-squared differences. | Exponential lepton mass ratios are studied in a low energy phenomenology. In view of the known data, the mass patterns of the charged leptons and widely discussed quasi-degenerate neutrinos are related to one another by two different traits - opposite mass ratios with large versus small exponents, and probably conforma... | This parameter is connected with a neutrino mass ratio, which is small and has a large exponent. The smallness of the atmospheric neutrino mixing angle is naturally explained. The experimental verification of the mass ratios in the range $10^{-2} \leq m_i/m_j \leq 1$ would provide a strong argument in favor of the Q-D... | Exponential lepton mass ratios are studied in a low energy phenomenology. In view of the known data, the mass patterns of the charged leptons and widely discussed quasi-degenerate neutrinos are related to one another by two different traits - opposite mass ratios with large versus small exponents, and probably conforma... | This is in agreement with the present solar neutrino data. | Exponential lepton mass ratios are studied in a low energy phenomenology. In view of the known data, the mass patterns of the charged leptons and widely discussed quasi-degenerate neutrinos are related to one another by two different traits - opposite mass ratios with large versus small exponents, and probably conforma... | This parameter is connected with the neutrino mass matrix structure, and can be used to constrain the parameters of the low-energy neutrino mass matrix. In the present work, we study the Q-D neutrino mass matrix structure, the parameter of the solar-atmospheric hierarchy, and the constraints on the neutrino mass matri... | Exponential lepton mass ratios are studied in a low energy phenomenology. In view of the known data, the mass patterns of the charged leptons and widely discussed quasi-degenerate neutrinos are related to one another by two different traits - opposite mass ratios with large versus small exponents, and probably conforma... | The smallness of the neutrino masses may be related to the smallness of the charged lepton masses, i.e., to the smallness of the Yukawa coupling constants. |
hep-ph/0009284 | Luca Silvestrini | L. Silvestrini | epsilon'/epsilon and Rare K Decays in the Standard Model and
Supersymmetry | 6 pages, talk given at the 4th International Conference On Hyperons,
Charm And Beauty Hadrons, 27-30 June 2000, Valencia, Spain | Nucl.Phys.Proc.Suppl. 93 (2001) 247-252 | 10.1016/S0920-5632(00)01112-9 | ROME1-1301/00 | hep-ph | null | After briefly reviewing the status of epsilon'/epsilon in the Standard Model,
I discuss SUSY contributions to epsilon'/epsilon, K^+ to pi^+ nu bar nu, K_L to
pi^0 nu bar nu and K_L to pi^0 e^+ e^-. While in the simplest case of the MSSM
with Minimal Flavour Violation the main effect is a suppression of these
transiti... | [
{
"created": "Mon, 25 Sep 2000 12:33:31 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Silvestrini",
"L.",
""
]
] | After briefly reviewing the status of epsilon'/epsilon in the Standard Model, I discuss SUSY contributions to epsilon'/epsilon, K^+ to pi^+ nu bar nu, K_L to pi^0 nu bar nu and K_L to pi^0 e^+ e^-. While in the simplest case of the MSSM with Minimal Flavour Violation the main effect is a suppression of these transition... | After briefly reviewing the status of epsilon'/epsilon in the Standard Model, I discuss SUSY contributions to epsilon'/epsilon, K^+ to pi^+ nu bar nu, K_L to pi^0 nu bar nu and K_L to pi^0 e^+ e^-. | While in the simplest case of the MSSM with Minimal Flavour Violation the main effect is a suppression of these transitions with respect to the Standard Model, large enhancements are possible in more general SUSY models, with interesting correlations among the different processes. | After briefly reviewing the status of epsilon'/epsilon in the Standard Model, I discuss SUSY contributions to epsilon'/epsilon, K^+ to pi^+ nu bar nu, K_L to pi^0 nu bar nu and K_L to pi^0 e^+ e^-. I argue that, in the context of SUSY models with large flavor violating couplings, the CP violating K_L to pi^0 nu bar nu ... | I argue that, in the context of SUSY models with large flavor violating couplings, the CP violating K_L to pi^0 nu bar nu amplitude is likely to be as large as the CP conserving one. I then discuss the implications of the K_L to pi^0 nu bar nu data on the K^+ to pi^+ nu bar nu and K_L to pi^0 e^+ e^- modes, and argue ... | After briefly reviewing the status of epsilon'/epsilon in the Standard Model, I discuss SUSY contributions to epsilon'/epsilon, K^+ to pi^+ nu bar nu, K_L to pi^0 nu bar nu and K_L to pi^0 e^+ e^-. I argue that, in order to obtain a good fit to the data, one has to go beyond the Minimal Supersymmetric Standard Model. I... | I argue that, in order to obtain a good fit to the data, one has to go beyond the Minimal Supersymmetric Standard Model. I describe a possible solution in the context of string theory. | After briefly reviewing the status of epsilon'/epsilon in the Standard Model, I discuss SUSY contributions to epsilon'/epsilon, K^+ to pi^+ nu bar nu, K_L to pi^0 nu bar nu and K_L to pi^0 e^+ e^-. I will then discuss a new CP asymmetry in K^+ to pi^+ nu bar nu, K_L to pi^0 nu bar nu and K_L to pi^0 e^+ e^-, and how it... | I will then discuss a new CP asymmetry in K^+ to pi^+ nu bar nu, K_L to pi^0 nu bar nu and K_L to pi^0 e^+ e^-, and how it can be used to study the K^+ to pi^+ nu bar nu and K_L to pi^0 nu bar nu amplitudes in the presence of new physics. The latter is of special interest in the context of the experimental searches fo... | After briefly reviewing the status of epsilon'/epsilon in the Standard Model, I discuss SUSY contributions to epsilon'/epsilon, K^+ to pi^+ nu bar nu, K_L to pi^0 nu bar nu and K_L to pi^0 e^+ e^-. I argue that, in the context of SUSY models, the branching ratio of K^+ to pi^+ nu bar nu can be as large as 10^{-11} and ... | I argue that, in the context of SUSY models, the branching ratio of K^+ to pi^+ nu bar nu can be as large as 10^{-11} and that of K_L to pi^0 nu bar nu can be as large as 10^{-11}, while the bound on BR(K_L to pi^0 e^+ e^-) is only weakly correlated with the other two. The branching ratio of K^+ to pi^+ nu bar nu can ... |
hep-ph/0703107 | Yukihiro Mimura | Ilia Gogoladze, Chin-Aik Lee, Yukihiro Mimura and Qaisar Shafi | Yukawa Couplings in a Model with Gauge, Higgs and Matter Unification | 12 pages | Phys.Lett.B649:212-217,2007 | 10.1016/j.physletb.2007.03.042 | MIFP-07-07 | hep-ph | null | We discuss how unification of the gauge, Higgs and (three chiral family)
matter superfields can be realized from the compactification of a six
dimensional supersymmetric SU(8) gauge theory over the orbifold R^4 x T^2/Z_3.
The bulk gauge interaction includes Yukawa interactions to generate masses for
quarks and lepton... | [
{
"created": "Fri, 9 Mar 2007 20:46:32 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Gogoladze",
"Ilia",
""
],
[
"Lee",
"Chin-Aik",
""
],
[
"Mimura",
"Yukihiro",
""
],
[
"Shafi",
"Qaisar",
""
]
] | We discuss how unification of the gauge, Higgs and (three chiral family) matter superfields can be realized from the compactification of a six dimensional supersymmetric SU(8) gauge theory over the orbifold R^4 x T^2/Z_3. The bulk gauge interaction includes Yukawa interactions to generate masses for quarks and leptons ... | We discuss how unification of the gauge, Higgs and (three chiral family) matter superfields can be realized from the compactification of a six dimensional supersymmetric SU(8) gauge theory over the orbifold R^4 x T^2/Z_3. The bulk gauge interaction includes Yukawa interactions to generate masses for quarks and leptons ... | To overcome this we introduce brane fields which are vector-like under the standard model gauge symmetry, and so do not alter the number of chiral families. In such a setup, the observed fermion masses and mixings can be realized by taking into account suppression effects from the effective Wilson line couplings and la... | We discuss how unification of the gauge, Higgs and (three chiral family) matter superfields can be realized from the compactification of a six dimensional supersymmetric SU(8) gauge theory over the orbifold R^4 x T^2/Z_3. The bulk gauge interaction includes Yukawa interactions to generate masses for quarks and leptons ... | To overcome this problem, we introduce a set of SU(8) singlet chiral superfields which can be assigned to the matter multiplets in the SU(8) gauge theory. After the orbifold projection, these singlets become zero modes, and can be interpreted as bulk matter multiplets. | We discuss how unification of the gauge, Higgs and (three chiral family) matter superfields can be realized from the compactification of a six dimensional supersymmetric SU(8) gauge theory over the orbifold R^4 x T^2/Z_3. The bulk gauge interaction includes Yukawa interactions to generate masses for quarks and leptons ... | To overcome this problem, we introduce a new mechanism based on a six dimensional supersymmetric gauge theory with an anomalous U(1)_X gauge symmetry. We show that this new mechanism can generate quark and lepton masses as well as their mixings. In particular, the mixing among quark generations can be generated throug... | We discuss how unification of the gauge, Higgs and (three chiral family) matter superfields can be realized from the compactification of a six dimensional supersymmetric SU(8) gauge theory over the orbifold R^4 x T^2/Z_3. The bulk gauge interaction includes Yukawa interactions to generate masses for quarks and leptons ... | We show how to modify the model to allow for phenomenologically acceptable Yukawa matrices. The modification consists of adding a Higgs superfield in the bulk and a brane fermion superfield on one of the fixed planes. We also discuss the role of the discrete gauge symmetry under which the brane fermion is charged, and... | We discuss how unification of the gauge, Higgs and (three chiral family) matter superfields can be realized from the compactification of a six dimensional supersymmetric SU(8) gauge theory over the orbifold R^4 x T^2/Z_3. The bulk gauge interaction includes Yukawa interactions to generate masses for quarks and leptons ... | We show how to circumvent this problem by adding a supersymmetric six dimensional SO(16) x SO(16) gauge theory. The six dimensional SO(16) gauge group is broken down to the six dimensional SU(8) gauge group by the same VEVs which break the SO(16) gauge symmetry to the SO(10) gauge symmetry. This SO(10) gauge symmetry ... |
1402.0607 | Thomas Rehagen | Thomas Rehagen and Graciela B. Gelmini | Effects of kination and scalar-tensor cosmologies on sterile neutrinos | 16 pages, 11 figures; v2: section on general constraints on H added,
text and figures improved, 1 figure added, accepted for publication in JCAP | null | 10.1088/1475-7516/2014/06/044 | null | hep-ph astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the effects of kination and scalar-tensor pre-Big Bang
Nucleosynthesis cosmologies on the non-resonant production of sterile
neutrinos. We show that if the peak of the production rate of sterile neutrinos
occurs during the non-standard cosmological phase, the relic number density of
sterile neutrinos could b... | [
{
"created": "Tue, 4 Feb 2014 03:37:08 GMT",
"version": "v1"
},
{
"created": "Thu, 19 Jun 2014 18:03:56 GMT",
"version": "v2"
}
] | 2015-06-18 | [
[
"Rehagen",
"Thomas",
""
],
[
"Gelmini",
"Graciela B.",
""
]
] | We study the effects of kination and scalar-tensor pre-Big Bang Nucleosynthesis cosmologies on the non-resonant production of sterile neutrinos. We show that if the peak of the production rate of sterile neutrinos occurs during the non-standard cosmological phase, the relic number density of sterile neutrinos could be ... | We study the effects of kination and scalar-tensor pre-Big Bang Nucleosynthesis cosmologies on the non-resonant production of sterile neutrinos. We show that if the peak of the production rate of sterile neutrinos occurs during the non-standard cosmological phase, the relic number density of sterile neutrinos could be ... | Consequently, current bounds on active-sterile neutrino mixing derived from the relic energy density of sterile neutrinos could be greatly relaxed. In particular, we show that the sterile neutrinos which could explain the anomalies found in short-baseline neutrino experiments are compatible with recent joint Planck upp... | We study the effects of kination and scalar-tensor pre-Big Bang Nucleosynthesis cosmologies on the non-resonant production of sterile neutrinos. We show that if the peak of the production rate of sterile neutrinos occurs during the non-standard cosmological phase, the relic number density of sterile neutrinos could be ... | This could help to solve the $3.5\sigma$ tension between the data of X-ray observations and the predictions of the standard cosmological model. | We study the effects of kination and scalar-tensor pre-Big Bang Nucleosynthesis cosmologies on the non-resonant production of sterile neutrinos. We show that if the peak of the production rate of sterile neutrinos occurs during the non-standard cosmological phase, the relic number density of sterile neutrinos could be ... | This could be relevant to explain the small value of the sterile neutrino fraction in the Dark Radiation component of the Cosmic Microwave Background anisotropies. | We study the effects of kination and scalar-tensor pre-Big Bang Nucleosynthesis cosmologies on the non-resonant production of sterile neutrinos. We show that if the peak of the production rate of sterile neutrinos occurs during the non-standard cosmological phase, the relic number density of sterile neutrinos could be ... | This could help to solve the tension between the observed number of sterile neutrinos in neutrino oscillation experiments and the number required by the explanation of the observed anomalies in short baseline neutrino experiments. | We study the effects of kination and scalar-tensor pre-Big Bang Nucleosynthesis cosmologies on the non-resonant production of sterile neutrinos. We show that if the peak of the production rate of sterile neutrinos occurs during the non-standard cosmological phase, the relic number density of sterile neutrinos could be ... | This could help to solve the $N_{eff}$ discrepancy and could be relevant for the production of sterile neutrinos in the mass range $10^{-2} \leq m_s \leq 10^{-1}$ eV. |
1803.06785 | Xin-Nian Wang | Tan Luo (CCNU), Shanshan Cao (Wayne State Univ), Yayun He (CCNU and
LBNL) and Xin-Nian Wang (CCNU and LBNL) | Multiple jets and $\gamma$-jet correlation in high-energy heavy-ion
collisions | 11 pages with 12 figures, revised version includes discussions on the
background subtraction and different definitions of jet profile | null | 10.1016/j.physletb.2018.06.025 | null | hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | $\gamma$-jet production is considered one of the best probes of the hot
quark-gluon plasma in high-energy heavy-ion collisions since the direct
$\gamma$ can be used to gauge the initial energy and momentum of the associated
jet. This is investigated within the Linear Boltzmann Transport (LBT) model for
jet propagatio... | [
{
"created": "Mon, 19 Mar 2018 02:27:03 GMT",
"version": "v1"
},
{
"created": "Wed, 11 Apr 2018 09:51:13 GMT",
"version": "v2"
}
] | 2018-06-20 | [
[
"Luo",
"Tan",
"",
"CCNU"
],
[
"Cao",
"Shanshan",
"",
"Wayne State Univ"
],
[
"He",
"Yayun",
"",
"CCNU and\n LBNL"
],
[
"Wang",
"Xin-Nian",
"",
"CCNU and LBNL"
]
] | $\gamma$-jet production is considered one of the best probes of the hot quark-gluon plasma in high-energy heavy-ion collisions since the direct $\gamma$ can be used to gauge the initial energy and momentum of the associated jet. This is investigated within the Linear Boltzmann Transport (LBT) model for jet propagation ... | $\gamma$-jet production is considered one of the best probes of the hot quark-gluon plasma in high-energy heavy-ion collisions since the direct $\gamma$ can be used to gauge the initial energy and momentum of the associated jet. This is investigated within the Linear Boltzmann Transport (LBT) model for jet propagation ... | Jet medium interaction not only suppresses the leading jet at large $p_T^{\rm jet}$ but also sub-leading jets at large azimuthal angle. This effectively leads to the narrowing of $\gamma$-jet correlation in azimuthal angle instead of broadening due to jet-medium interaction. The $\gamma$-jet profile on the other hand w... | $\gamma$-jet production is considered one of the best probes of the hot quark-gluon plasma in high-energy heavy-ion collisions since the direct $\gamma$ can be used to gauge the initial energy and momentum of the associated jet. This is investigated within the Linear Boltzmann Transport (LBT) model for jet propagation ... | This is due to the contribution from the initial jets that have a large relative angle with $\gamma$ and small $p_T^{\rm jet}$ from the induced jets that have the same direction as $\gamma$. The results suggest that $\gamma$-jet correlation is sensitive to the initial energy and momentum of the associated jet, and can... | $\gamma$-jet production is considered one of the best probes of the hot quark-gluon plasma in high-energy heavy-ion collisions since the direct $\gamma$ can be used to gauge the initial energy and momentum of the associated jet. This is investigated within the Linear Boltzmann Transport (LBT) model for jet propagation ... | The number of jets associated with $\gamma$ increases with collision centrality. The medium excitation induced by these jets is found to affect the $\gamma$-jet correlation in a non-negligible way. The results suggest that multiple jets associated with direct photons should be included in the theoretical description o... | $\gamma$-jet production is considered one of the best probes of the hot quark-gluon plasma in high-energy heavy-ion collisions since the direct $\gamma$ can be used to gauge the initial energy and momentum of the associated jet. This is investigated within the Linear Boltzmann Transport (LBT) model for jet propagation ... | The $\gamma$-jet correlation at small $p_T^{\rm jet}$ is dominated by the jet-induced medium excitation, whereas the correlation at large $p_T^{\rm jet}$ is governed by the parton energy loss. LBT also predicts the nuclear modification of $\gamma$-jet correlation in p+Pb collisions, which is dominated by the parton en... | $\gamma$-jet production is considered one of the best probes of the hot quark-gluon plasma in high-energy heavy-ion collisions since the direct $\gamma$ can be used to gauge the initial energy and momentum of the associated jet. This is investigated within the Linear Boltzmann Transport (LBT) model for jet propagation ... | The $\gamma$-jet correlation at small $p_T^{\rm jet}$ is sensitive to the jet transport coefficient $\hat{q}$ in the medium. The jet-induced medium response can enhance the $\gamma$-jet correlation at large $p_T^{\rm jet}$. The medium response is found to be significant at small $p_T^{\rm jet}$ and small azimuthal ang... |
hep-ph/0304185 | Taekoon Lee | Taekoon Lee | Heavy quark mass determination from the quarkonium ground state energy:
a pole mass approach | 16 pages; published version | JHEP0310:044,2003 | 10.1088/1126-6708/2003/10/044 | null | hep-ph | null | The heavy quark pole mass in perturbation theory suffers from a renormalon
caused, inherent uncertainty of $O(\Lambda_{\rm QCD})$. This fundamental
difficulty of determining the pole mass to an accuracy better than the inherent
uncertainty can be overcome by direct resummation of the first infrared
renormalon. We sho... | [
{
"created": "Sun, 20 Apr 2003 04:34:57 GMT",
"version": "v1"
},
{
"created": "Wed, 22 Oct 2003 09:27:48 GMT",
"version": "v2"
},
{
"created": "Wed, 5 Nov 2003 06:15:56 GMT",
"version": "v3"
}
] | 2009-11-10 | [
[
"Lee",
"Taekoon",
""
]
] | The heavy quark pole mass in perturbation theory suffers from a renormalon caused, inherent uncertainty of $O(\Lambda_{\rm QCD})$. This fundamental difficulty of determining the pole mass to an accuracy better than the inherent uncertainty can be overcome by direct resummation of the first infrared renormalon. We show ... | The heavy quark pole mass in perturbation theory suffers from a renormalon caused, inherent uncertainty of $O(\Lambda_{\rm QCD})$. This fundamental difficulty of determining the pole mass to an accuracy better than the inherent uncertainty can be overcome by direct resummation of the first infrared renormalon. | We show how a properly defined pole mass as well as the $\bar {\rm MS}$ mass for the top and bottom quarks can be determined accurately from the $O(m\alpha_s^5)$ quarkonium ground state energy. | The heavy quark pole mass in perturbation theory suffers from a renormalon caused, inherent uncertainty of $O(\Lambda_{\rm QCD})$. This fundamental difficulty of determining the pole mass to an accuracy better than the inherent uncertainty can be overcome by direct resummation of the first infrared renormalon. This res... | This resummation leads to a Borel summable series, which can be unambiguously and consistently resummed by the Borel-Pad\'e method. In the present paper, we apply this approach to the pole mass of the charm quark in the $\overline{\rm MS}$ scheme and find that the pole mass is $m_c^{\rm pole}=1.43\pm 0.07\,$GeV. The u... | The heavy quark pole mass in perturbation theory suffers from a renormalon caused, inherent uncertainty of $O(\Lambda_{\rm QCD})$. This fundamental difficulty of determining the pole mass to an accuracy better than the inherent uncertainty can be overcome by direct resummation of the first infrared renormalon. This all... | This allows one to obtain the heavy quark pole mass with an accuracy of $O(\Lambda_{\rm QCD}^3/m^2)$, where $m$ is the heavy quark mass. The method is applied to the heavy quark pole mass in quenched QCD with massless quarks. | The heavy quark pole mass in perturbation theory suffers from a renormalon caused, inherent uncertainty of $O(\Lambda_{\rm QCD})$. This fundamental difficulty of determining the pole mass to an accuracy better than the inherent uncertainty can be overcome by direct resummation of the first infrared renormalon. This all... | This allows one to construct a scheme-independent series in the $\bar\Lambda$-parameter, which is equivalent to the perturbative series in the pole mass, and which is free of the $\Lambda_{\rm QCD}$-uncertainty. The $\bar\Lambda$-series is then used to estimate the size of the first renormalon-induced uncertainty in t... | The heavy quark pole mass in perturbation theory suffers from a renormalon caused, inherent uncertainty of $O(\Lambda_{\rm QCD})$. This fundamental difficulty of determining the pole mass to an accuracy better than the inherent uncertainty can be overcome by direct resummation of the first infrared renormalon. This all... | This allows one to construct a scheme invariant, non-perturbative, pole mass which is renormalon-free and has an uncertainty of $O(\Lambda^2_{\rm QCD})$ and is therefore well under control. The resummed pole mass is applicable for any infrared safe observable and is thus well suited for the determination of the heavy ... |
1702.05239 | Peter Hintz | Peter Hintz | Uniqueness of Kerr-Newman-de Sitter black holes with small angular
momenta | 10 pages, 1 figure. v2 is the published version, with updated
bibliography | Ann. Henri Poincare, 19(2):607-617, 2018 | 10.1007/s00023-017-0633-7 | null | gr-qc math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that a stationary solution of the Einstein-Maxwell equations which is
close to a non-degenerate Reissner-Nordstr\"om-de Sitter solution is in fact
equal to a slowly rotating Kerr-Newman-de Sitter solution. The proof uses the
non-linear stability of the Kerr-Newman-de Sitter family of black holes for
small ang... | [
{
"created": "Fri, 17 Feb 2017 07:02:54 GMT",
"version": "v1"
},
{
"created": "Wed, 27 May 2020 15:28:39 GMT",
"version": "v2"
}
] | 2020-05-28 | [
[
"Hintz",
"Peter",
""
]
] | We show that a stationary solution of the Einstein-Maxwell equations which is close to a non-degenerate Reissner-Nordstr\"om-de Sitter solution is in fact equal to a slowly rotating Kerr-Newman-de Sitter solution. The proof uses the non-linear stability of the Kerr-Newman-de Sitter family of black holes for small angul... | We show that a stationary solution of the Einstein-Maxwell equations which is close to a non-degenerate Reissner-Nordstr\"om-de Sitter solution is in fact equal to a slowly rotating Kerr-Newman-de Sitter solution. The proof uses the non-linear stability of the Kerr-Newman-de Sitter family of black holes for small angul... | Our black hole uniqueness result only requires the solution to have high but finite regularity; in particular, we do not make any analyticity assumptions. | We show that a stationary solution of the Einstein-Maxwell equations which is close to a non-degenerate Reissner-Nordstr\"om-de Sitter solution is in fact equal to a slowly rotating Kerr-Newman-de Sitter solution. The proof uses the non-linear stability of the Kerr-Newman-de Sitter family of black holes for small angul... | The proof also applies to other black hole families, in particular, to the Reissner-Nordstr\"om family with cosmological constant and to the non-degenerate Kerr-Newman family of black holes. | We show that a stationary solution of the Einstein-Maxwell equations which is close to a non-degenerate Reissner-Nordstr\"om-de Sitter solution is in fact equal to a slowly rotating Kerr-Newman-de Sitter solution. The proof uses the non-linear stability of the Kerr-Newman-de Sitter family of black holes for small angul... | The result provides the first example of a non-linear stability result for asymptotically locally anti-de Sitter spacetimes. | We show that a stationary solution of the Einstein-Maxwell equations which is close to a non-degenerate Reissner-Nordstr\"om-de Sitter solution is in fact equal to a slowly rotating Kerr-Newman-de Sitter solution. The proof uses the non-linear stability of the Kerr-Newman-de Sitter family of black holes for small angul... | The proof also applies to other non-degenerate Reissner-Nordstr\"om-de Sitter solutions such as charged C-metric solutions and Reissner-Nordstr\"om-anti-de Sitter solutions. The main result is that these stationary solutions are in fact slowly rotating black holes with a non-trivial horizon topology.
\end{abstract}
\... | We show that a stationary solution of the Einstein-Maxwell equations which is close to a non-degenerate Reissner-Nordstr\"om-de Sitter solution is in fact equal to a slowly rotating Kerr-Newman-de Sitter solution. The proof uses the non-linear stability of the Kerr-Newman-de Sitter family of black holes for small angul... | The proof also applies to other non-degenerate Reissner-Nordstr\"om-de Sitter solutions such as the C-metric. |
2312.08045 | Karim Thebault | Antonis Antoniou and Karim P. Y. Th\'ebault | Theories Without Models: Uncontrolled Idealizations in Particle Physics | null | null | null | null | hep-ph hep-th physics.hist-ph | http://creativecommons.org/licenses/by/4.0/ | The perturbative treatment of realistic quantum field theories, such as
quantum electrodynamics, requires the use of mathematical idealizations in the
approximation series for scattering amplitudes. Such mathematical idealisations
are necessary to derive empirically relevant models from the theory.
Mathematical ideal... | [
{
"created": "Wed, 13 Dec 2023 10:54:56 GMT",
"version": "v1"
}
] | 2023-12-14 | [
[
"Antoniou",
"Antonis",
""
],
[
"Thébault",
"Karim P. Y.",
""
]
] | The perturbative treatment of realistic quantum field theories, such as quantum electrodynamics, requires the use of mathematical idealizations in the approximation series for scattering amplitudes. Such mathematical idealisations are necessary to derive empirically relevant models from the theory. Mathematical idealiz... | The perturbative treatment of realistic quantum field theories, such as quantum electrodynamics, requires the use of mathematical idealizations in the approximation series for scattering amplitudes. Such mathematical idealisations are necessary to derive empirically relevant models from the theory. Mathematical idealiz... | Drawing upon negative formal results in asymptotic analysis (failure of Borel summability) and renormalization group theory (failure of asymptotic safety), we argue that the mathematical idealizations applied in perturbative quantum electrodynamics should be understood as uncontrolled. This, in turn, leads to the probl... | The perturbative treatment of realistic quantum field theories, such as quantum electrodynamics, requires the use of mathematical idealizations in the approximation series for scattering amplitudes. Such mathematical idealisations are necessary to derive empirically relevant models from the theory. Mathematical idealiz... | In this paper, we argue that, when it comes to the treatment of divergences in quantum field theory, the most widely used method, the renormalization program, leads to the use of uncontrolled mathematical idealizations. We argue that the presence of uncontrolled mathematical idealizations in the renormalization progra... | The perturbative treatment of realistic quantum field theories, such as quantum electrodynamics, requires the use of mathematical idealizations in the approximation series for scattering amplitudes. Such mathematical idealisations are necessary to derive empirically relevant models from the theory. Mathematical idealiz... | Uncontrolled idealizations may lead to empirical models which are in conflict with basic physical principles of the underlying theory. In this case, the empirical model must be discarded or the theory must be changed. This paper provides an introduction to the use of mathematical idealizations in quantum field theory.... | The perturbative treatment of realistic quantum field theories, such as quantum electrodynamics, requires the use of mathematical idealizations in the approximation series for scattering amplitudes. Such mathematical idealisations are necessary to derive empirically relevant models from the theory. Mathematical idealiz... | For controlled idealizations, the effects of the idealization can be calculated in terms of a small parameter. An example of a controlled idealization is the use of the adiabatic approximation in the derivation of the Standard Model. An example of an uncontrolled idealization is the use of the ultraviolet cutoff in th... | The perturbative treatment of realistic quantum field theories, such as quantum electrodynamics, requires the use of mathematical idealizations in the approximation series for scattering amplitudes. Such mathematical idealisations are necessary to derive empirically relevant models from the theory. Mathematical idealiz... | For controlled idealizations, the idealized model is empirically relevant, in the sense that it is a good approximation of the theory. For uncontrolled idealizations, the idealized model is empirically irrelevant. This paper argues that the perturbative treatment of realistic quantum field theories requires the use of... |
1811.12401 | Michele Levi | Michele Levi | A public framework for Feynman calculations and post-Newtonian gravity | 9 pages, 1 figure | Proceedings of the MG15 Meeting on General Relativity 2018 (2022)
990 | 10.1142/9789811258251_0137 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We report here on a line of work that has played a key role in formally
establishing and going beyond the state of the art in the effective field
theory (EFT) approach and in post-Newtonian (PN) gravity. We also outline here
how this comprehensive framework in fact forms the outset of a prospective rich
research prog... | [
{
"created": "Thu, 29 Nov 2018 18:59:44 GMT",
"version": "v1"
},
{
"created": "Mon, 14 Jan 2019 15:43:40 GMT",
"version": "v2"
}
] | 2022-07-15 | [
[
"Levi",
"Michele",
""
]
] | We report here on a line of work that has played a key role in formally establishing and going beyond the state of the art in the effective field theory (EFT) approach and in post-Newtonian (PN) gravity. We also outline here how this comprehensive framework in fact forms the outset of a prospective rich research progra... | We report here on a line of work that has played a key role in formally establishing and going beyond the state of the art in the effective field theory (EFT) approach and in post-Newtonian (PN) gravity. | We also outline here how this comprehensive framework in fact forms the outset of a prospective rich research program, building on the public Feynman and PN technology developed. | We report here on a line of work that has played a key role in formally establishing and going beyond the state of the art in the effective field theory (EFT) approach and in post-Newtonian (PN) gravity. We have used this work to develop a new approach to the construction of the EFT that is based on a direct computatio... | We have used this work to develop a new approach to the construction of the EFT that is based on a direct computation of the scattering amplitude and the matching of its ultraviolet (UV) and IR behavior. This work has led to an alternative, complementary and more rigorous derivation of the EFT for general relativity (... | We report here on a line of work that has played a key role in formally establishing and going beyond the state of the art in the effective field theory (EFT) approach and in post-Newtonian (PN) gravity. We review the structure of EFT, and the role that its symmetries play in its construction. We describe the technique... | We review the structure of EFT, and the role that its symmetries play in its construction. We describe the techniques of amplitude-based matching for the derivation of its Wilson coefficients. We illustrate the use of these techniques in the derivation of the complete EFT of the binary in the inspiral regime, includin... | We report here on a line of work that has played a key role in formally establishing and going beyond the state of the art in the effective field theory (EFT) approach and in post-Newtonian (PN) gravity. We have used the EFT approach to model the gravitational dynamics of the early Universe, in particular for the gener... | We have used the EFT approach to model the gravitational dynamics of the early Universe, in particular for the generation of primordial perturbations and for the computation of their observables in cosmology. We have also worked on the extension of the EFT approach to higher orders in the PN expansion. The EFT approac... | We report here on a line of work that has played a key role in formally establishing and going beyond the state of the art in the effective field theory (EFT) approach and in post-Newtonian (PN) gravity. We have used the EFT approach to model the gravitational dynamics of point masses, spinning objects, and even light-... | We have used the EFT approach to model the gravitational dynamics of point masses, spinning objects, and even light-like objects, in the weak field limit. The EFT approach has also allowed us to provide an accurate representation of the gravitational dynamics of extended bodies. The results are of interest to the comm... |
hep-ph/0206177 | Aaron Pierce | Hitoshi Murayama and Aaron Pierce | Realistic Dirac Leptogenesis | 4 pages, 1 figure. Uses RevTex. Reference Added. Minor changes in
wording | Phys.Rev.Lett.89:271601,2002 | 10.1103/PhysRevLett.89.271601 | UCB-PTH-02/26, LBNL-50854 | hep-ph | null | We present a model of leptogenesis that preserves lepton number. The model
maintains the important feature of more traditional leptogenesis scenarios: the
decaying particles that provide the CP violation necessary for baryogenesis
also provide the explanation for the smallness of the neutrino Yukawa
couplings. This m... | [
{
"created": "Wed, 19 Jun 2002 23:23:33 GMT",
"version": "v1"
},
{
"created": "Tue, 2 Jul 2002 18:07:58 GMT",
"version": "v2"
}
] | 2009-09-29 | [
[
"Murayama",
"Hitoshi",
""
],
[
"Pierce",
"Aaron",
""
]
] | We present a model of leptogenesis that preserves lepton number. The model maintains the important feature of more traditional leptogenesis scenarios: the decaying particles that provide the CP violation necessary for baryogenesis also provide the explanation for the smallness of the neutrino Yukawa couplings. This mod... | We present a model of leptogenesis that preserves lepton number. The model maintains the important feature of more traditional leptogenesis scenarios: the decaying particles that provide the CP violation necessary for baryogenesis also provide the explanation for the smallness of the neutrino Yukawa couplings. | This model clearly demonstrates that, contrary to conventional wisdom, neutrinos need not be Majorana in nature in order to help explain the baryon asymmetry of the universe. | We present a model of leptogenesis that preserves lepton number. The model maintains the important feature of more traditional leptogenesis scenarios: the decaying particles that provide the CP violation necessary for baryogenesis also provide the explanation for the smallness of the neutrino Yukawa couplings. However,... | However, the CP violation is not encoded in the phases of the Yukawa couplings but rather in the CP violating couplings of a new SU(2) singlet field. The model is based on a new $U(1)$ gauge symmetry that is broken to $U(1)_{B-L}$ at a scale around the weak scale. The new symmetry allows the model to avoid the strong ... | We present a model of leptogenesis that preserves lepton number. The model maintains the important feature of more traditional leptogenesis scenarios: the decaying particles that provide the CP violation necessary for baryogenesis also provide the explanation for the smallness of the neutrino Yukawa couplings. However,... | However, the model is able to do so without violating baryon number. This is achieved by introducing a new U(1) gauge symmetry, which is broken by the presence of heavy vector-like leptons. The model is in the same class of models as the generalized seesaw model, and the mechanism by which it suppresses the Yukawa cou... | We present a model of leptogenesis that preserves lepton number. The model maintains the important feature of more traditional leptogenesis scenarios: the decaying particles that provide the CP violation necessary for baryogenesis also provide the explanation for the smallness of the neutrino Yukawa couplings. However,... | However, we do not rely on the decay of heavy neutrinos to create the lepton asymmetry. Instead, we propose a new mechanism for leptogenesis that relies on the presence of heavy charged leptons. The model also includes a new source of CP violation: the relative CP phases between the heavy neutrino and charged lepton m... | We present a model of leptogenesis that preserves lepton number. The model maintains the important feature of more traditional leptogenesis scenarios: the decaying particles that provide the CP violation necessary for baryogenesis also provide the explanation for the smallness of the neutrino Yukawa couplings. However,... | However, the model is able to generate a lepton asymmetry without the traditional CP violating phases. Instead, the CP violation is provided by a new CP violating phase in the scalar potential. This phase leads to an asymmetry between the number of leptons and anti-leptons, but not between the number of leptons of a p... |
hep-ph/9703278 | Konstantin Chetyrkin | K. G. Chetyrkin | Quark Mass Anomalous Dimension to alpha_s**4 | 7 pages, LaTeX; elsart.sty is used (included) | Phys.Lett. B404 (1997) 161-165 | 10.1016/S0370-2693(97)00535-2 | MPI/PhT/96-019 | hep-ph | null | We present the results of analytic calculation of the quark mass anomalous
dimension to alpha_s**4.
| [
{
"created": "Sun, 9 Mar 1997 22:58:28 GMT",
"version": "v1"
}
] | 2009-10-30 | [
[
"Chetyrkin",
"K. G.",
""
]
] | We present the results of analytic calculation of the quark mass anomalous dimension to alpha_s**4. | We present the results of analytic calculation of | the quark mass anomalous dimension to alpha_s**4. | We present the results of analytic calculation of the two-loop contribution to the QCD corrections to the decay $B_s \to \gamma\gamma$. The obtained result is finite and free from the infrared and ultraviolet renormalization ambiguities. The result is expressed in terms of 4-, 5- and 6-point scalar integrals. | the two-loop contribution to the QCD corrections to the decay $B_s \to \gamma\gamma$. The obtained result is finite and free from the infrared and ultraviolet renormalization ambiguities. The result is expressed in terms of 4-, 5- and 6-point scalar integrals. | We present the results of analytic calculation of the static potential for a heavy quark-antiquark pair in the N=2 super Yang-Mills theory. The potential is calculated in the gauge where the spatial components of the gauge fields are diagonal and the color components are diagonal. We find that the potential is the sum ... | the static potential for a heavy quark-antiquark pair in the N=2 super Yang-Mills theory. The potential is calculated in the gauge where the spatial components of the gauge fields are diagonal and the color components are diagonal. We find that the potential is the sum of the Coulomb potential and the linear potential... | We present the results of analytic calculation of the two-point correlation function of the field $V$ in the case of $N\gg 1$, $\beta\gg 1$ and $g^2\beta^2\ll 1$.
\subsection{Analytic calculation of the two-point correlation function}
We consider the case when the field $V$ is not very small, i.e. the fluctuations of... | the two-point correlation function of the field $V$ in the case of $N\gg 1$, $\beta\gg 1$ and $g^2\beta^2\ll 1$.
\subsection{Analytic calculation of the two-point correlation function}
We consider the case when the field $V$ is not very small, i.e. the fluctuations of the field $V$ are of the order of the average va... | We present the results of analytic calculation of the two-loop radiative corrections to the forward-backward asymmetry in the decay of polarized top quarks. We find that the two-loop radiative corrections to the asymmetry are small, but that the asymmetry is sensitive to the top mass. We also discuss the radiative corr... | the two-loop radiative corrections to the forward-backward asymmetry in the decay of polarized top quarks. We find that the two-loop radiative corrections to the asymmetry are small, but that the asymmetry is sensitive to the top mass. We also discuss the radiative corrections to the asymmetry in the context of the to... |
hep-ph/9503493 | German Valencia | G. Valencia (Iowa State University) | Experimental Signatures of a Parity Violating Anomalous Coupling $g_5^Z$ | 10 pages LaTeX, 2 postscript figures, uses epsf Invited talk at the
International Symposium on Vector Boson Self-Interactions, UCLA 1995 | null | 10.1063/1.49301 | ISU-HET-95-2 | hep-ph | null | I discuss the experimental signatures of a parity violating but CP conserving
interaction in the symmetry breaking sector of the electroweak theory.
| [
{
"created": "Sat, 1 Apr 1995 22:09:34 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Valencia",
"G.",
"",
"Iowa State University"
]
] | I discuss the experimental signatures of a parity violating but CP conserving interaction in the symmetry breaking sector of the electroweak theory. | I discuss the experimental signatures of a parity violating but CP | conserving interaction in the symmetry breaking sector of the electroweak theory. | I discuss the experimental signatures of a parity violating but CP conserving phase in the B_s mixing amplitude, which could arise from the gluino penguin in supersymmetric theories. I present a method to measure the CP phase in the B_s mixing amplitude by studying the time-dependent CP asymmetry in the B_s -> J/psi K_... | conserving phase in the B_s mixing amplitude, which could arise from the gluino penguin in supersymmetric theories. I present a method to measure the CP phase in the B_s mixing amplitude by studying the time-dependent CP asymmetry in the B_s -> J/psi K_S decay. | I discuss the experimental signatures of a parity violating but CP invariant violation in the form of the electric dipole moments of charged leptons, and of the neutron. I also discuss the experimental signatures of a CP violating but parity invariant violation in the form of the electric dipole moments of neutral meso... | invariant violation in the form of the electric dipole moments of charged leptons, and of the neutron. I also discuss the experimental signatures of a CP violating but parity invariant violation in the form of the electric dipole moments of neutral mesons, and of the neutron. | I discuss the experimental signatures of a parity violating but CP conserving phase in the Standard Model and its extensions.
In particular I will focus on the effects in the neutral kaon system, and the sensitivity of future measurements of the electric dipole moment of the neutron and the electron.
The experimental s... | conserving phase in the Standard Model and its extensions.
In particular I will focus on the effects in the neutral kaon system, and the sensitivity of future measurements of the electric dipole moment of the neutron and the electron.
The experimental signatures of a CP violating phase in the Standard Model and its ex... | I discuss the experimental signatures of a parity violating but CP conserving phase in the CKM matrix. | conserving phase in the CKM matrix. |
1605.08976 | Saheb Soroushfar | Saheb Soroushfar, Reza Saffari, Sobhan Kazempour, Saskia Grunau, Jutta
Kunz | Detailed study of geodesics in the Kerr-Newman-(A)dS spactime and the
rotating charged black hole spacetime in $f(R)$ gravity | 35 pages,3 table,24 figures, Accepted for publication in Physical
Review D. arXiv admin note: text overlap with arXiv:1605.08975,
arXiv:1601.03143 | Phys. Rev. D 94, 024052 (2016) | 10.1103/PhysRevD.94.024052 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We perform a detailed study of the geodesic equations in the spacetime of the
static and rotating charged black hole corresponding to the Kerr-Newman-(A)dS
spacetime. We derive the equations of motion for test particles and light rays
and present their solutions in terms of the Weierstrass $\wp$, $\zeta$ and
$\sigma$... | [
{
"created": "Sun, 29 May 2016 08:11:58 GMT",
"version": "v1"
},
{
"created": "Tue, 19 Jul 2016 10:49:04 GMT",
"version": "v2"
}
] | 2016-08-02 | [
[
"Soroushfar",
"Saheb",
""
],
[
"Saffari",
"Reza",
""
],
[
"Kazempour",
"Sobhan",
""
],
[
"Grunau",
"Saskia",
""
],
[
"Kunz",
"Jutta",
""
]
] | We perform a detailed study of the geodesic equations in the spacetime of the static and rotating charged black hole corresponding to the Kerr-Newman-(A)dS spacetime. We derive the equations of motion for test particles and light rays and present their solutions in terms of the Weierstrass $\wp$, $\zeta$ and $\sigma$ f... | We perform a detailed study of the geodesic equations in the spacetime of the static and rotating charged black hole corresponding to the Kerr-Newman-(A)dS spacetime. We derive the equations of motion for test particles and light rays and present their solutions in terms of the Weierstrass $\wp$, $\zeta$ and $\sigma$ f... | With the help of parametric diagrams and effective potentials we analyze the geodesic motion and classify the possible orbit types. This spacetime is also a solution of $f(R)$ gravity with a constant curvature scalar. | We perform a detailed study of the geodesic equations in the spacetime of the static and rotating charged black hole corresponding to the Kerr-Newman-(A)dS spacetime. We derive the equations of motion for test particles and light rays and present their solutions in terms of the Weierstrass $\wp$, $\zeta$ and $\sigma$ f... | We also present the corresponding solutions in terms of the Jacobi elliptic functions. The solutions are obtained in terms of the Weierstrass and Kleinian elliptic functions for the generic case and in terms of the Jacobi elliptic functions for the special cases of the extreme and the degenerate cases. We also present... | We perform a detailed study of the geodesic equations in the spacetime of the static and rotating charged black hole corresponding to the Kerr-Newman-(A)dS spacetime. We derive the equations of motion for test particles and light rays and present their solutions in terms of the Weierstrass $\wp$, $\zeta$ and $\sigma$ f... | We also present a complete analysis of the equations of motion for circular and bound orbits. We derive the equations for the energy and angular momentum of particles and light rays in terms of the Weierstrass elliptic functions and show that they are related to the elliptic Lambert $\wp$-function. We also present a d... | We perform a detailed study of the geodesic equations in the spacetime of the static and rotating charged black hole corresponding to the Kerr-Newman-(A)dS spacetime. We derive the equations of motion for test particles and light rays and present their solutions in terms of the Weierstrass $\wp$, $\zeta$ and $\sigma$ f... | We also discuss the motion of test particles and light rays in the weak field approximation. We derive the deflection angle of light rays passing by the black hole and calculate the perihelion advance of test particles in a bound orbit around the black hole. We further discuss the motion of particles with arbitrary en... | We perform a detailed study of the geodesic equations in the spacetime of the static and rotating charged black hole corresponding to the Kerr-Newman-(A)dS spacetime. We derive the equations of motion for test particles and light rays and present their solutions in terms of the Weierstrass $\wp$, $\zeta$ and $\sigma$ f... | We also present the first integrals of the equations of motion, the corresponding conserved quantities and the effective potentials. We discuss the influence of the cosmological constant on the orbital structure of the black hole spacetime. |
0909.2460 | Bruce Mellado | T. Han and B. Mellado | Higgs Boson Searches and the Hbbar Coupling at the LHeC | 9 pages, 7 figures | Phys.Rev.D82:016009,2010 | 10.1103/PhysRevD.82.016009 | null | hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Once the existence of the Higgs boson is established at the CERN Large Hadron
Collider (LHC), the focus will be shifted toward understanding its couplings to
other particles. A crucial aspect is the measurement of the bottom Yukawa
coupling, which is challenging at the LHC. In this paper we study the use of
forward j... | [
{
"created": "Mon, 14 Sep 2009 02:06:10 GMT",
"version": "v1"
}
] | 2014-11-20 | [
[
"Han",
"T.",
""
],
[
"Mellado",
"B.",
""
]
] | Once the existence of the Higgs boson is established at the CERN Large Hadron Collider (LHC), the focus will be shifted toward understanding its couplings to other particles. A crucial aspect is the measurement of the bottom Yukawa coupling, which is challenging at the LHC. In this paper we study the use of forward jet... | Once the existence of the Higgs boson is established at the CERN Large Hadron Collider (LHC), the focus will be shifted toward understanding its couplings to other particles. A crucial aspect is the measurement of the bottom Yukawa coupling, which is challenging at the LHC. In this paper we study the use of forward jet... | We demonstrate that the requirement of forward jet tagging in charged current events strongly enhances the signal-to-background ratio. The impact of a veto on additional partons is also discussed. Excellent response to hadronic shower and b-tagging capabilities are pivotal detector performance aspects. | Once the existence of the Higgs boson is established at the CERN Large Hadron Collider (LHC), the focus will be shifted toward understanding its couplings to other particles. A crucial aspect is the measurement of the bottom Yukawa coupling, which is challenging at the LHC. In this paper we study the use of forward jet... | We present a feasibility study for the Large Hadron electron Collider (LHeC) and the Future Circular Collider (FCC-eh) to show that the bottom Yukawa coupling can be measured with a statistical precision of about 5% at the LHeC and 3% at the FCC-eh, with the help of forward jet tagging. | Once the existence of the Higgs boson is established at the CERN Large Hadron Collider (LHC), the focus will be shifted toward understanding its couplings to other particles. A crucial aspect is the measurement of the bottom Yukawa coupling, which is challenging at the LHC. In this paper we study the use of forward jet... | We present a method to distinguish the Higgs boson production process from QCD background processes by means of a jet tagging procedure based on a matrix element analysis of the substructure of the forward jets. This method can be applied to both, the inclusive and the charm-tagged Higgs production processes. | Once the existence of the Higgs boson is established at the CERN Large Hadron Collider (LHC), the focus will be shifted toward understanding its couplings to other particles. A crucial aspect is the measurement of the bottom Yukawa coupling, which is challenging at the LHC. In this paper we study the use of forward jet... | The potential of forward jet tagging to enhance the Higgs boson signal and suppress the background from heavy quark pair production is investigated by means of a fully simulated Monte Carlo sample for the LHC electron-proton collider option. We show that forward jet tagging significantly increases the sensitivity of t... | Once the existence of the Higgs boson is established at the CERN Large Hadron Collider (LHC), the focus will be shifted toward understanding its couplings to other particles. A crucial aspect is the measurement of the bottom Yukawa coupling, which is challenging at the LHC. In this paper we study the use of forward jet... | We present results for the Higgs boson production cross section at next-to-next-to-leading order in the strong coupling constant alpha_s, and for the realistic forward jet tagging efficiency. We find that the forward jet tagging can improve the Higgs signal significance from 2.2 sigma to 3.5 sigma for an integrated lu... |
hep-ph/9712420 | Lucas Taylor | John Swain and Lucas Taylor | First determination of the quark mixing matrix element Vtb independent
of assumptions of unitarity | 4 pages, 2 figures | Phys.Rev. D58 (1998) 093006 | 10.1103/PhysRevD.58.093006 | null | hep-ph | null | We present a new method for the determination of the
Cabibbo-Kobayashi-Maskawa quark mixing matrix element $|V_{tb}|$ from
electroweak loop corrections, in particular those affecting the process $Z\to
b\bar{b}$. From a combined analysis of results from the LEP, SLC, Tevatron, and
neutrino scattering experiments we de... | [
{
"created": "Wed, 17 Dec 1997 16:13:07 GMT",
"version": "v1"
}
] | 2009-10-30 | [
[
"Swain",
"John",
""
],
[
"Taylor",
"Lucas",
""
]
] | We present a new method for the determination of the Cabibbo-Kobayashi-Maskawa quark mixing matrix element $|V_{tb}|$ from electroweak loop corrections, in particular those affecting the process $Z\to b\bar{b}$. From a combined analysis of results from the LEP, SLC, Tevatron, and neutrino scattering experiments we dete... | We present a new method for the determination of the Cabibbo-Kobayashi-Maskawa quark mixing matrix element $|V_{tb}|$ from electroweak loop corrections, in particular those affecting the process $Z\to b\bar{b}$. From a combined analysis of results from the LEP, SLC, Tevatron, and neutrino scattering experiments we dete... | This is the first determination of $|V_{tb}|$ which is independent of unitarity assumptions. | We present a new method for the determination of the Cabibbo-Kobayashi-Maskawa quark mixing matrix element $|V_{tb}|$ from electroweak loop corrections, in particular those affecting the process $Z\to b\bar{b}$. From a combined analysis of results from the LEP, SLC, Tevatron, and neutrino scattering experiments we dete... | This result is based on a new next-to-leading order calculation of the loop corrections to the $Zb\bar{b}$ vertex and a new determination of the hadronic $Z$ width $\Gamma_{\text{had}}$. | We present a new method for the determination of the Cabibbo-Kobayashi-Maskawa quark mixing matrix element $|V_{tb}|$ from electroweak loop corrections, in particular those affecting the process $Z\to b\bar{b}$. From a combined analysis of results from the LEP, SLC, Tevatron, and neutrino scattering experiments we dete... | This result is completely independent of the value of the top quark mass, which is only used as an input for the evaluation of the electroweak gauge couplings. We discuss the implications of our result for the issue of top quark mass determinations. | We present a new method for the determination of the Cabibbo-Kobayashi-Maskawa quark mixing matrix element $|V_{tb}|$ from electroweak loop corrections, in particular those affecting the process $Z\to b\bar{b}$. From a combined analysis of results from the LEP, SLC, Tevatron, and neutrino scattering experiments we dete... | This result is completely independent of the top quark mass and can be considered as a measurement of the top quark width. It is in good agreement with the Standard Model expectation of $|V_{tb}| \approx 1$. The method can be applied to other processes, such as $Z\to c\bar{c}$, where $|V_{cb}|$ is measured, and to $t\... | We present a new method for the determination of the Cabibbo-Kobayashi-Maskawa quark mixing matrix element $|V_{tb}|$ from electroweak loop corrections, in particular those affecting the process $Z\to b\bar{b}$. From a combined analysis of results from the LEP, SLC, Tevatron, and neutrino scattering experiments we dete... | This result is based on a new technique which we have developed for the analysis of electroweak loop corrections, and is also the first determination of $|V_{tb}|$ from electroweak radiative corrections. |
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