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arxiv | Title: Hecke-Clifford algebras and spin Hecke algebras I: the classical affine type
Abstract: Associated to the classical Weyl groups, we introduce the notion of degenerate spin affine Hecke algebras and affine Hecke-Clifford algebras. For these algebras, we establish the PBW properties, formulate the intertwiners, a... |
arxiv | Title: Towards Minimal Resources of Measurement-based Quantum Computation
Abstract: We improve the upper bound on the minimal resources required for measurement-based quantum computation. Minimizing the resources required for this model is a key issue for experimental realization of a quantum computer based on projecti... |
arxiv | Title: A Spitzer census of the IC 348 nebula
Abstract: We present a Spitzer based census of the IC 348 nebula and embedded star cluster. Our Spitzer census supplemented by ground based spectra has added 42 class II T-Tauri sources to the cluster membership and identified ~20 class 0/I protostars. The population of IC 3... |
arxiv | Title: Non-Equilibrium Josephson and Andreev Current through Interacting Quantum Dots
Abstract: We present a theory of transport through interacting quantum dots coupled to normal and superconducting leads in the limit of weak tunnel coupling. A Josephson current between two superconducting leads, carried by first-or... |
arxiv | Title: Discovery of X-ray emission from the young radio pulsar PSR J1357-6429
Abstract: We present the first X-ray detection of the very young pulsar PSR J1357-6429 (characteristic age of 7.3 kyr) using data from the XMM-Newton and Chandra satellites. We find that the spectrum is well described by a power-law plus blac... |
arxiv | Title: Resonant activation in bistable semiconductor lasers
Abstract: We theoretically investigate the possibility of observing resonant activation in the hopping dynamics of two-mode semiconductor lasers. We present a series of simulations of a rate-equations model under random and periodic modulation of the bias curr... |
arxiv | Title: Quark matter and the astrophysics of neutron stars
Abstract: Some of the means through which the possible presence of nearly deconfined quarks in neutron stars can be detected by astrophysical observations of neutron stars from their birth to old age are highlighted. |
arxiv | Title: Some non-braided fusion categories of rank 3
Abstract: We classify all fusion categories for a given set of fusion rules with three simple object types. If a conjecture of Ostrik is true, our classification completes the classification of fusion categories with three simple object types. To facilitate the discus... |
arxiv | Title: Chandra Observations of Supernova 1987A
Abstract: We have been monitoring Supernova (SN) 1987A with {\it Chandra X-Ray Observatory} since 1999. We present a review of previous results from our {\it Chandra} observations, and some preliminary results from new {\it Chandra} data obtained in 2006 and 2007. High res... |
arxiv | Title: Classification of superpotentials
Abstract: We extend our previous classification of superpotentials of ``scalar curvature type" for the cohomogeneity one Ricci-flat equations. We now consider the case not covered in our previous paper, i.e., when some weight vector of the superpotential lies outside (a scaled t... |
arxiv | Title: Linkedness and ordered cycles in digraphs
Abstract: The minimum semi-degree of a digraph D is the minimum of its minimum outdegree and its minimum indegree. We show that every sufficiently large digraph D with minimum semi-degree at least n/2 +k-1 is k-linked. The bound on the minimum semi-degree is best possibl... |
arxiv | Title: Curvature and isocurvature perturbations in two-field inflation
Abstract: We study cosmological perturbations in two-field inflation, allowing for non-standard kinetic terms. We calculate analytically the spectra of curvature and isocurvature modes at Hubble crossing, up to first order in the slow-roll parameter... |
arxiv | Title: Geometric Complexity Theory V: On deciding nonvanishing of a generalized Littlewood-Richardson coefficient
Abstract: This article has been withdrawn because it has been merged with the earlier article GCT3 (arXiv: CS/0501076 [cs.CC]) in the series. The merged article is now available as: Geometric Complexity... |
arxiv | Title: A schematic model of scattering in PT-symmetric Quantum Mechanics
Abstract: One-dimensional scattering problem admitting a complex, PT-symmetric short-range potential V(x) is considered. Using a Runge-Kutta-discretized version of Schroedinger equation we derive the formulae for the reflection and transmission co... |
arxiv | Title: The exact asymptotic of the collision time tail distribution for independent Brownian particles with different drifts
Abstract: In this note we consider the time of the collision $\tau$ for $n$ independent Brownian motions $X^1_t,...,X_t^n$ with drifts $a_1,...,a_n$, each starting from $x=(x_1,...,x_n)$, where... |
arxiv | Title: Ab initio Study of Graphene on SiC
Abstract: Employing density-functional calculations we study single and double graphene layers on Si- and C-terminated 1x1-6H-SiC surfaces. We show that, in contrast to earlier assumptions, the first carbon layer is covalently bonded to the substrate, and cannot be responsible ... |
arxiv | Title: Capacity of a Multiple-Antenna Fading Channel with a Quantized Precoding Matrix
Abstract: Given a multiple-input multiple-output (MIMO) channel, feedback from the receiver can be used to specify a transmit precoding matrix, which selectively activates the strongest channel modes. Here we analyze the performanc... |
arxiv | Title: On Almost Periodicity Criteria for Morphic Sequences in Some Particular Cases
Abstract: In some particular cases we give criteria for morphic sequences to be almost periodic (=uniformly recurrent). Namely, we deal with fixed points of non-erasing morphisms and with automatic sequences. In both cases a polynomi... |
arxiv | Title: The Radio Emission, X-ray Emission, and Hydrodynamics of G328.4+0.2: A Comprehensive Analysis of a Luminous Pulsar Wind Nebula, its Neutron Star, and the Progenitor Supernova Explosion
Abstract: We present new observational results obtained for the Galactic non-thermal radio source G328.4+0.2 to determine bo... |
arxiv | Title: Three Particle Correlations from STAR
Abstract: Two-particle correlations have shown modification to the away-side shape in central Au+Au collisions relative to $pp$, d+Au and peripheral Au+Au collisions. Different scenarios can explain this modification including: large angle gluon radiation, jets deflected by ... |
arxiv | Title: The Return of a Static Universe and the End of Cosmology
Abstract: We demonstrate that as we extrapolate the current $\Lambda$CDM universe forward in time, all evidence of the Hubble expansion will disappear, so that observers in our "island universe" will be fundamentally incapable of determining the true natur... |
arxiv | Title: Dark Matter annihilation in Draco: new considerations on the expected gamma flux
Abstract: A new estimation of the gamma-ray flux that we expect to detect from SUSY dark matter annihilation from the Draco dSph is presented using the DM density profiles compatible with the latest observations. This calculation ... |
arxiv | Title: Magnetohydrodynamic Rebound Shocks of Supernovae
Abstract: We construct magnetohydrodynamic (MHD) similarity rebound shocks joining `quasi-static' asymptotic solutions around the central degenerate core to explore an MHD model for the evolution of random magnetic field in supernova explosions. This provides a th... |
arxiv | Title: Are There Mach Cones in Heavy Ion Collisions? Three-Particle Correlations from STAR
Abstract: We present results from STAR on 3-particle azimuthal correlations for a $3<p_T<4$ GeV/c trigger particle with two softer $1<p_T<2$ GeV/c particles. Results are shown for pp, d+Au and high statistics Au+Au collisions a... |
arxiv | Title: Exploring First Stars Era with GLAST
Abstract: Cosmic infrared background (CIB) includes emissions from objects inaccessible to current telescopic studies, such as the putative Population III, the first stars. Recently, strong direct evidence for significant CIB levels produced by the first stars came from CIB f... |
arxiv | Title: Correlated modulation between the redshifted Fe K alpha line and the continuum emission in NGC 3783
Abstract: It has been suggested that X-ray observations of rapidly variable Seyfert galaxies may hold the key to probe the gas orbital motions in the innermost regions of accretion discs around black holes and, ... |
arxiv | Title: Isotopic Effects in Nuclear Reactions at Relativistic Energies
Abstract: A systematic study of isotopic effects in the break-up of projectile spectators at relativistic energies has been performed at the GSI laboratory with the ALADiN spectrometer coupled to the LAND neutron detector. Besides a primary beam of 1... |
arxiv | Title: Einstein vs Maxwell: Is gravitation a curvature of space, a field in flat space, or both?
Abstract: Starting with a field theoretic approach in Minkowski space, the gravitational energy momentum tensor is derived from the Einstein equations in a straightforward manner. This allows to present them as {\it accel... |
arxiv | Title: Geometric Complexity Theory VI: the flip via saturated and positive integer programming in representation theory and algebraic geometry
Abstract: This article belongs to a series on geometric complexity theory (GCT), an approach to the P vs. NP and related problems through algebraic geometry and representation... |
arxiv | Title: Two new basaltic asteroids in the Outer Main Belt?
Abstract: The identification of basaltic asteroids in the asteroid Main Belt and the description of their surface mineralogy is necessary to understand the diversity in the collection of basaltic meteorites. Basaltic asteroids can be identified from their visibl... |
arxiv | Title: Interpolating and sampling sequences in finite Riemann surfaces
Abstract: We provide a description of the interpolating and sampling sequences on a space of holomorphic functions with a uniform growth restriction defined on finite Riemann surfaces. |
arxiv | Title: New algebraic aspects of perturbative and non-perturbative Quantum Field Theory
Abstract: In this expository article we review recent advances in our understanding of the combinatorial and algebraic structure of perturbation theory in terms of Feynman graphs, and Dyson-Schwinger equations. Starting from Lie an... |
arxiv | Title: Many-body interband tunneling as a witness for complex dynamics in the Bose-Hubbard model
Abstract: A perturbative model is studied for the tunneling of many-particle states from the ground band to the first excited energy band, mimicking Landau-Zener decay for ultracold, spinless atoms in quasi-one dimensiona... |
arxiv | Title: Comments on ``Are Swift Gamma-Ray Bursts consistent with the Ghirlanda relation?", by Campana et al.(astro--ph/0703676)
Abstract: In their recent paper, Campana et al. (2007) found that 5 bursts, among those detected by Swift, are outliers with respect to the E_peak-E_gamma ("Ghirlanda") correlation. We instea... |
arxiv | Title: The Determination of the Helicity of $W'$ Boson Couplings at the LHC
Abstract: Apart from its mass and width, the most important property of a new charged gauge boson, $W'$, is the helicity of its couplings to the SM fermions. Such particles are expected to exist in many extensions of the Standard Model. In this... |
arxiv | Title: Curvature flows in semi-Riemannian manifolds
Abstract: We prove that the limit hypersurfaces of converging curvature flows are stable, if the initial velocity has a weak sign, and give a survey of the existence and regularity results. |
arxiv | Title: Hydrodynamic and Spectral Simulations of HMXB Winds
Abstract: We describe preliminary results of a global model of the radiatively-driven photoionized wind and accretion flow of the high-mass X-ray binary Vela X-1. The full model combines FLASH hydrodynamic calculations, XSTAR photoionization calculations, HULLA... |
arxiv | Title: Radio Astrometric Detection and Characterization of Extra-Solar Planets: A White Paper Submitted to the NSF ExoPlanet Task Force
Abstract: The extraordinary astrometric accuracy of radio interferometry creates an important and unique opportunity for the discovery and characterization of exo-planets. Currently,... |
arxiv | Title: Interface dynamics of microscopic cavities in water
Abstract: An analytical description of the interface motion of a collapsing nanometer-sized spherical cavity in water is presented by a modification of the Rayleigh-Plesset equation in conjunction with explicit solvent molecular dynamics simulations. Quantitati... |
arxiv | Title: Viscosity, Black Holes, and Quantum Field Theory
Abstract: We review recent progress in applying the AdS/CFT correspondence to finite-temperature field theory. In particular, we show how the hydrodynamic behavior of field theory is reflected in the low-momentum limit of correlation functions computed through a r... |
arxiv | Title: Superconducting states of the quasi-2D Holstein model: Effects of vertex and non-local corrections
Abstract: I investigate superconducting states in a quasi-2D Holstein model using the dynamical cluster approximation (DCA). The effects of spatial fluctuations (non-local corrections) are examined and approximat... |
arxiv | Title: Masers and star formation
Abstract: Recent observational and theoretical advances concerning astronomical masers in star forming regions are reviewed. Major masing species are considered individually and in combination. Key results are summarized with emphasis on present science and future prospects. |
arxiv | Title: Renormalized quasiparticles in antiferromagnetic states of the Hubbard model
Abstract: We analyze the properties of the quasiparticle excitations of metallic antiferromagnetic states in a strongly correlated electron system. The study is based on dynamical mean field theory (DMFT) for the infinite dimensional ... |
arxiv | Title: Comparison of exact-exchange calculations for solids in current-spin-density- and spin-density-functional theory
Abstract: The relative merits of current-spin-density- and spin-density-functional theory are investigated for solids treated within the exact-exchange-only approximation. Spin-orbit splittings and ... |
arxiv | Title: One-loop MHV Rules and Pure Yang-Mills
Abstract: It has been known for some time that the standard MHV diagram formulation of perturbative Yang-Mills theory is incomplete, as it misses rational terms in one-loop scattering amplitudes of pure Yang-Mills. We propose that certain Lorentz violating counterterms, whe... |
arxiv | Title: Fermi-liquid effects in the transresistivity in quantum Hall double layers near $\nu= 1/2 $
Abstract: Here, we present theoretical studies of the temperature and magnetic field dependences of the Coulomb drag transresistivity between two parallel layers of two dimensional electron gases in quantum Hall regime ... |
arxiv | Title: Geometry of four-dimensional Killing spinors
Abstract: The supersymmetric solutions of N=2, D=4 minimal ungauged and gauged supergravity are classified according to the fraction of preserved supersymmetry using spinorial geometry techniques. Subject to a reasonable assumption in the 1/2-supersymmetric time-like ... |
arxiv | Title: A Rigorous Time-Domain Analysis of Full--Wave Electromagnetic Cloaking (Invisibility)
Abstract: There is currently a great deal of interest in the theoretical and practical possibility of cloaking objects from the observation by electromagnetic waves. The basic idea of these invisibility devices \cite{glu1, gl... |
arxiv | Title: Non-perturbative conserving approximations and Luttinger's sum rule
Abstract: Weak-coupling conserving approximations can be constructed by truncations of the Luttinger-Ward functional and are well known as thermodynamically consistent approaches which respect macroscopic conservation laws as well as certain sum... |
arxiv | Title: 2D-MIT as self-doping of a Wigner-Mott insulator
Abstract: We consider an interaction-driven scenario for the two-dimensional metal-insulator transition in zero magnetic field (2D-MIT), based on melting the Wigner crystal through vacancy-interstitial pair formation. We show that the transition from the Wigner-Mo... |
arxiv | Title: Entanglement of Subspaces and Error Correcting Codes
Abstract: We introduce the notion of entanglement of subspaces as a measure that quantify the entanglement of bipartite states in a randomly selected subspace. We discuss its properties and in particular we show that for maximally entangled subspaces it is add... |
arxiv | Title: Does the present data on B_s - bar B_s mixing rule out a large enhancement in the branching ratio of B_s --> mu+ mu- ?
Abstract: In this letter, we consider the constraints imposed by the recent measurement of B_s - bar B_s mixing on the new physics contribution to the rare decay B_s --> mu+ mu-. New physics i... |
arxiv | Title: The Spitzer c2d Survey of Large, Nearby, Interstellar Clouds VIII. Serpens Observed with MIPS
Abstract: We present maps of 1.5 square degrees of the Serpens dark cloud at 24, 70, and 160\micron observed with the Spitzer Space Telescope MIPS Camera. More than 2400 compact sources have been extracted at 24um, ne... |
arxiv | Title: Unravelling the sbottom spin at the CERN LHC
Abstract: Establishing that a signal of new physics is undoubtly supersymmetric requires not only the discovery of the supersymmetric partners but also probing their spins and couplings. We show that the sbottom spin can be probed at the CERN Large Hadron Collider usi... |
arxiv | Title: Modeling the three-point correlation function
Abstract: We present new predictions for the galaxy three-point correlation function (3PCF) using high-resolution dissipationless cosmological simulations of a flat LCDM Universe which resolve galaxy-size halos and subhalos. We create realistic mock galaxy catalogs b... |
arxiv | Title: Multi-spectral Observations of Lunar Occultations: I. Resolving The Dust Shell Around AFGL 5440
Abstract: We present observations and modeling of a lunar occultation of the dust-enshrouded carbon star AFGL 5440. The observations were made over a continuous range of wavelengths from 1 - 4um with a high-speed sp... |
arxiv | Title: Orbifold cohomology of abelian symplectic reductions and the case of weighted projective spaces
Abstract: These notes accompany a lecture about the topology of symplectic (and other) quotients. The aim is two-fold: first to advertise the ease of computation in the symplectic category; and second to give an acc... |
arxiv | Title: Correlation functions in the Non Perturbative Renormalization Group and field expansion
Abstract: The usual procedure of including a finite number of vertices in Non Perturbative Renormalization Group equations in order to obtain $n$-point correlation functions at finite momenta is analyzed. This is done by ex... |
arxiv | Title: Formation and Collisional Evolution of Kuiper Belt Objects
Abstract: This chapter summarizes analytic theory and numerical calculations for the formation and collisional evolution of KBOs at 20--150 AU. We describe the main predictions of a baseline self-stirring model and show how dynamical perturbations from a... |
arxiv | Title: On Existence of Boundary Values of Polyharmonic Functions
Abstract: In trigonometric series terms all polyharmonic functions inside the unit disk are described. For such functions it is proved the existence of their boundary values on the unit circle in the space of hyperfunctions. The necessary and sufficient c... |
arxiv | Title: Constraints on the Self-Interaction Cross-Section of Dark Matter from Numerical Simulations of the Merging Galaxy Cluster 1E 0657-5
Abstract: (Abridged) We compare recent results from X-ray, strong lensing, weak lensing, and optical observations with numerical simulations of the merging galaxy cluster 1E0657-5... |
arxiv | Title: Stringy Instantons at Orbifold Singularities
Abstract: We study the effects produced by D-brane instantons on the holomorphic quantities of a D-brane gauge theory at an orbifold singularity. These effects are not limited to reproducing the well known contributions of the gauge theory instantons but also generate... |
arxiv | Title: Turbulent Diffusion of Lines and Circulations
Abstract: We study material lines and passive vectors in a model of turbulent flow at infinite-Reynolds number, the Kraichnan-Kazantsev ensemble of velocities that are white-noise in time and rough (Hoelder continuous) in space. It is argued that the phenomenon of ``... |
arxiv | Title: Gluon Radiation of an Expanding Color Skyrmion in the Quark-Gluon Plasma
Abstract: The density of states and energy spectrum of the gluon radiation are calculated for the color current of an expanding hydrodynamic skyrmion in the quark gluon plasma with a semiclassical method. Results are compared with those in ... |
arxiv | Title: REM near-IR and optical multiband observations of PKS2155-304 in 2005
Abstract: Spectral variability is the main tool for constraining emission models of BL Lac objects. By means of systematic observations of the BL Lac prototype PKS 2155-304 in the infrared-optical band, we explore variability on the scales o... |
arxiv | Title: Supernova Polarization and the Type IIn Classification
Abstract: While the members of the Type IIn category of supernovae are united by the presence of strong multicomponent Balmer emission lines in their spectra, they are quite heterogeneous with respect to other properties such as Balmer line profiles, light c... |
arxiv | Title: Near-Infrared Spectra of the Black Hole X-Ray Binary, A0620-00
Abstract: We present broadband NIR spectra of A0620-00 obtained with SpeX on the IRTF. The spectrum is characterized by a blue continuum on which are superimposed broad emission lines of HI and HeII and a host of narrower absorption lines of neutral ... |
arxiv | Title: Automated Generation of Layout and Control for Quantum Circuits
Abstract: We present a computer-aided design flow for quantum circuits, complete with automatic layout and control logic extraction. To motivate automated layout for quantum circuits, we investigate grid-based layouts and show a performance variance... |
arxiv | Title: Modeling the Spectral Energy Distribution and Variability of 3C 66A during the WEBT campaign of 2003 -- 2004
Abstract: The BL Lac object 3C 66A was observed in an extensive multiwavelength monitoring campaign from July 2003 till April 2004. The spectral energy distribution (SED) was measured over the entire el... |
arxiv | Title: The HARPS search for southern extra-solar planets. X. A m sin i = 11 Mearth planet around the nearby spotted M dwarf GJ 674
Abstract: Context: How planet properties depend on stellar mass is a key diagnostic of planetary formation mechanisms. Aims: This motivates planet searches around stars which are signific... |
arxiv | Title: An individual based model with global competition interaction: fluctuations effects in pattern formation
Abstract: We present some numerical results obtained from a simple individual based model that describes clustering of organisms caused by competition. Our aim is to show how, even when a deterministic desc... |
arxiv | Title: A Comparison between Anomalous 6-cm H$_2$CO Absorption and CO(1-0) Emission in the L1204/S140
Abstract: We report observations of the dust cloud L1204 with the Onsala 25-m telescope in the 6 cm (1$_{11}-1_{10}$) transition of \htco. The observed region includes the S140 H${\alpha}$ arc. This spectral line is... |
arxiv | Title: Dimers on surface graphs and spin structures. II
Abstract: In a previous paper, we showed how certain orientations of the edges of a graph G embedded in a closed oriented surface S can be understood as discrete spin structures on S. We then used this correspondence to give a geometric proof of the Pfaffian formu... |
arxiv | Title: New version announcement for TaylUR, an arbitrary-order diagonal automatic differentiation package for Fortran 95
Abstract: We present a new version of TaylUR, a Fortran 95 module to automatically compute the numerical values of a complex-valued function's derivatives with respect to several variables up to an... |
arxiv | Title: Mapping radii of metric spaces
Abstract: It is known that every closed curve of length \leq 4 in R^n (n>0) can be surrounded by a sphere of radius 1, and that this is the best bound. Letting S denote the circle of circumference 4, with the arc-length metric, we here express this fact by saying that the "mapping ... |
arxiv | Title: A New Model For The Loop-I (The North Polar Spur) Region
Abstract: The North Polar Spur (NPS) is the brightest filament of Loop I, a large circular feature in the radio continuum sky. In this paper, a model consisting of two synchrotron emitting shells is presented that reproduces large-scale structures revealed... |
arxiv | Title: Leray numbers of projections and a topological Helly type theorem
Abstract: Let X be a simplicial complex on the vertex set V. The rational Leray number L(X) of X is the minimal d such that the rational reduced homology of any induced subcomplex of X vanishes in dimensions d and above. Let \pi be a simplicial ma... |
arxiv | Title: q-Deformed spin foam models of quantum gravity
Abstract: We numerically study Barrett-Crane models of Riemannian quantum gravity. We have extended the existing numerical techniques to handle q-deformed models and arbitrary space-time triangulations. We present and interpret expectation values of a few selected o... |
arxiv | Title: HI velocity dispersion in NGC 1058
Abstract: We present excellent resolution and high sensitivity Very Large Array (VLA) observations of the 21cm HI line emission from the face-on galaxy NGC 1058, providing the first reliable study of the HI profile shapes throughout the entire disk of an external galaxy. Our ob... |
arxiv | Title: Common Envelope Evolution Redux
Abstract: Common envelopes form in dynamical time scale mass exchange, when the envelope of a donor star engulfs a much denser companion, and the core of the donor plus the dense companion star spiral inward through this dissipative envelope. As conceived by Paczynski and Ostriker... |
arxiv | Title: The Source of Turbulence in Astrophysical Disks: An Ill-posed Problem.
Abstract: An critical overview of the current state of research in turbulence in astrophysical disks. |
arxiv | Title: On Punctured Pragmatic Space-Time Codes in Block Fading Channel
Abstract: This paper considers the use of punctured convolutional codes to obtain pragmatic space-time trellis codes over block-fading channel. We show that good performance can be achieved even when puncturation is adopted and that we can still emp... |
arxiv | Title: On the Markov trace for Temperley--Lieb algebras of type $E_n$
Abstract: We show that there is a unique Markov trace on the tower of Temperley--Lieb type quotients of Hecke algebras of Coxeter type $E_n$ (for all $n \geq 6$). We explain in detail how this trace may be computed easily using tom Dieck's calculus o... |
arxiv | Title: Second Order Perturbative Calculation of Quasinormal Modes of Schwarzschild Black Holes
Abstract: We analytically calculate to second order the correction to the asymptotic form of quasinormal frequencies of four dimensional Schwarzschild black holes based on the monodromy analysis proposed by Motl and Neitzke... |
arxiv | Title: Epitaxial graphene
Abstract: Graphene multilayers are grown epitaxially on single crystal silicon carbide. This system is composed of several graphene layers of which the first layer is electron doped due to the built-in electric field and the other layers are essentially undoped. Unlike graphite the charge carr... |
arxiv | Title: Mathematics of thermoacoustic tomography
Abstract: The paper presents a survey of mathematical problems, techniques, and challenges arising in the Thermoacoustic and Photoacoustic Tomography. |
arxiv | Title: Search for Very High Energy Emission from Gamma-Ray Bursts using Milagro
Abstract: Gamma-Ray Bursts (GRBs) have been detected at GeV energies by EGRET and models predict emission at > 100 GeV. Milagro is a wide field (2 sr) high duty cycle (> 90 %) ground based water Cherenkov detector that records extensive air... |
arxiv | Title: Specific heat and bimodality in canonical and grand canonical versions of the thermodynamic model
Abstract: We address two issues in the thermodynamic model for nuclear disassembly. Surprisingly large differences in results for specific heat were seen in predictions from the canonical and grand canonical ensem... |
arxiv | Title: Vortex proliferation in the Berezinskii-Kosterlitz-Thouless regime on a two-dimensional lattice of Bose-Einstein condensates
Abstract: We observe the proliferation of vortices in the Berezinskii-Kosterlitz-Thouless regime on a two-dimensional array of Josephson-coupled Bose-Einstein condensates. As long as the... |
arxiv | Title: The core binary fractions of star clusters from realistic simulations
Abstract: We investigate the evolution of binary fractions in star clusters using N-body models of up to 100000 stars. Primordial binary frequencies in these models range from 5% to 50%. Simulations are performed with the NBODY4 code and inclu... |
arxiv | Title: Approaching the Heisenberg limit in an atom laser
Abstract: We present experimental and theoretical results showing the improved beam quality and reduced divergence of an atom laser produced by an optical Raman transition, compared to one produced by an RF transition. We show that Raman outcoupling can eliminate... |
arxiv | Title: A practical Seedless Infrared-Safe Cone jet algorithm
Abstract: Current cone jet algorithms, widely used at hadron colliders, take event particles as seeds in an iterative search for stable cones. A longstanding infrared (IR) unsafety issue in such algorithms is often assumed to be solvable by adding extra `midp... |
arxiv | Title: Isospin breaking in the yield of heavy meson pairs in e+e- annihilation near threshold
Abstract: We revisit the problem of interplay between the strong and the Coulomb interaction in the charged-to-neutral yield ratio for $B {\bar B}$ and $D {\bar D}$ pairs near their respective thresholds in $e^+e^-$ annihila... |
arxiv | Title: QED x QCD Resummation and Shower/ME Matching for LHC Physics
Abstract: We present the theory of QED x QCD resummation and its interplay with shower/matrix element matching in precision LHC physics scenarios. We illustrate the theory using single heavy gauge boson production at hadron colliders. |
arxiv | Title: On the number of topological types occurring in a parametrized family of arrangements
Abstract: Let ${\mathcal S}(\R)$ be an o-minimal structure over $\R$, $T \subset \R^{k_1+k_2+\ell}$ a closed definable set, and $$ \displaylines{\pi_1: \R^{k_1+k_2+\ell}\to \R^{k_1 + k_2}, \pi_2: \R^{k_1+k_2+\ell}\to \R^{\ell... |
arxiv | Title: Generalized Twistor Transform And Dualities, With A New Description of Particles With Spin, Beyond Free and Massless
Abstract: A generalized twistor transform for spinning particles in 3+1 dimensions is constructed that beautifully unifies many types of spinning systems by mapping them to the same twistor, thu... |
arxiv | Title: Remnant evolution after a carbon-oxygen white dwarf merger
Abstract: We systematically explore the evolution of the merger of two carbon-oxygen (CO) white dwarfs. The dynamical evolution of a 0.9 Msun + 0.6 Msun CO white dwarf merger is followed by a three-dimensional SPH simulation. We use an elaborate prescrip... |
arxiv | Title: Direct Theorems in the Theory of Approximation of the Banach Space Vectors by Entire Vectors of Exponential Type
Abstract: For an arbitrary operator A on a Banach space X which is a generator of C_0-group with certain growth condition at the infinity, the direct theorems on connection between the smoothness de... |
arxiv | Title: Parametrized Post-Newtonian Expansion of Chern-Simons Gravity
Abstract: We investigate the weak-field, post-Newtonian expansion to the solution of the field equations in Chern-Simons gravity with a perfect fluid source. In particular, we study the mapping of this solution to the parameterized post-Newtonian form... |
arxiv | Title: Scaling of Resistance and Electron Mean Free Path of Single-Walled Carbon Nanotubes
Abstract: We present an experimental investigation on the scaling of resistance in individual single walled carbon nanotube devices with channel lengths that vary four orders of magnitude on the same sample. The electron mean f... |
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