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122 papers · 1 filter
2-Gerbes bound by complexes of gr-stacks, and cohomology
Ettore Aldrovandi
We define 2-gerbes bound by complexes of braided group-like stacks. We prove a classification result in terms of hypercohomology groups with values in abelian crossed squares and c…
Knotting of random ring polymers in confined spaces
C. Micheletti, D. Marenduzzo, E. Orlandini +1
Stochastic simulations are used to characterize the knotting distributions of random ring polymers confined in spheres of various radii. The approach is based on the use of multipl…
Low temperature solution of the Sherrington-Kirkpatrick model
Sergey Pankov
We propose a simple scaling ansatz for the full replica symmetry breaking solution of the Sherrington-Kirkpatrick model in the low energy sector. This solution is shown to become e…
Critical Phenomena and the Quantum Critical Point of Ferromagnetic Zr1-xNbxZn2
D. A. Sokolov, M. C. Aronson, W. Gannon +1
We present a study of the magnetic properties of Zr1-xNbxZn2, using an Arrott plot analysis of the magnetization. The Curie temperature TC is suppressed to zero temperature for Nb…
Supersymmetry Parameter Analysis: SPA Convention and Project
J. A. Aguilar-Saavedra, A. Ali, B. C. Allanach +122
High-precision analyses of supersymmetry parameters aim at reconstructing the fundamental supersymmetric theory and its breaking mechanism. A well defined theoretical framework is…
Notes on 2-groupoids, 2-groups and crossed-modules
Behrang Noohi
This paper contains some basic results on 2-groupoids, with special emphasis on computing derived mapping 2-groupoids between 2-groupoids and proving their invariance under stricti…
Magneto-Dielectric Effect in the S = 1/2 Quasi-Two Dimensional Antiferromagnet K2V3O8
R. C. Rai, J. Cao, J. L. Musfeldt +6
We report the optical and magneto-optical properties of K2V3O8, an S=1/2 quasi-two-dimensional Heisenberg antiferromagnet. Local spin density approximation electronic structure cal…
Field-driven solid-on-solid interfaces moving under a stochastic Arrhenius dynamic: effects of the barrier height
G. M. Buendia, P. A. Rikvold, M. Kolesik
We present analytical results and kinetic Monte Carlo simulations for the mobility and microscopic structure of solid-on-solid (SOS) interfaces driven far from equilibrium by an ex…
Low energy antideuterons: shedding light on dark matter
Howard Baer, Stefano Profumo
Low energy antideuterons suffer a very low secondary and tertiary astrophysical background, while they can be abundantly synthesized in dark matter pair annihilations, therefore pr…
Biased Metropolis-Heat-Bath Algorithm for Fundamental-Adjoint SU(2) Lattice Gauge Theory
Alexei Bazavov, Bernd A. Berg, Urs M. Heller
For SU(2) lattice gauge theory with the fundamental-adjoint action an efficient heat-bath algorithm is not known so that one had to rely on Metropolis simulations supplemented by o…
Measurement of the Isolated Photon Cross Section in p-pbar Collisions at sqrt{s}=1.96 TeV
D0 Collaboration
The cross section for the inclusive production of isolated photons has been measured in p anti-p collisions at sqrt{s}=1.96 TeV with the D0 detector at the Fermilab Tevatron Collid…
On the treatment of threshold effects in SUSY spectrum computations
H. Baer, J. Ferrandis, S. Kraml +1
We take a critical view of the treatment of threshold effects in SUSY spectrum computations from high-scale input. We discuss the two principal methods of (a) renormalization at a…
Exploring the BWCA (Bino-Wino Co-Annihilation) Scenario for Neutralino Dark Matter
Howard Baer, Tadas Krupovnickas, Azar Mustafayev +3
In supersymmetric models with non-universal gaugino masses, it is possible to have opposite-sign SU(2) and U(1) gaugino mass terms. In these models, the gaugino eigenstates experie…
Phase Fluctuations in Strongly Coupled -Wave Superconductors
M. Mayr, G. Alvarez, C. Sen +1
We present a numerically exact solution for the BCS Hamiltonian at any temperature, including the degrees of freedom associated with classical phase, as well as amplitude, fluctuat…
Search for pentaquark in high statistics measurement of at CLAS
M. Battaglieri, R. De Vita, V. Kubarovsky +5
The exclusive reaction was studied in the photon energy range between 1.6-3.8 GeV searching for evidence of the exotic baryon . The decay…
Nuclear Modification of Electron Spectra and Implications for Heavy Quark Energy Loss in Au+Au Collisions at sqrt(s_NN)=200 GeV
PHENIX Collaboration, S. S. Adler
The PHENIX experiment has measured mid-rapidity transverse momentum spectra (0.4 < p_T < 5.0 GeV/c) of electrons as a function of centrality in Au+Au collisions at sqrt(s_NN)=200 G…
Monolayer charged quantum films: A quantum simulation study
Keola Wierschem, Efstratios Manousakis
We use path-integral Monte Carlo (PIMC) to study the effects of adding a long-range repulsive Coulomb interaction to the usual Van der Waals interaction between two atoms of a subm…
Electron Scattering From High-Momentum Neutrons in Deuterium
A. V. Klimenko, S. E. Kuhn
We report results from an experiment measuring the semi-inclusive reaction where the proton is moving at a large angle relative to the momentum transfer. If we a…
Critical behavior of strongly coupled lattice QCD at finite temperature
Yasuo Umino
We study the critical behavior of lattice Quantum Chromodynamics (QCD) in the strong coupling approximation with Kogut-Susskind and Wilson fermions at finite temperature () and…
Jet Structure from Dihadron Correlations in d+Au collisions at sqrt(s_NN) = 200 GeV
PHENIX Collaboration, S. S. Adler
Dihadron correlations at high transverse momentum in d+Au collisions at sqrt(s_NN) = 200 GeV at midrapidity are measured by the PHENIX experiment at the Relativistic Heavy Ion Coll…
Magneto-optical evidence of double exchange in a percolating lattice
G. Caimi, A. Perucchi, L. Degiorgi +5
Substituting by in ferromagnetic leads to a percolation limited magnetic ordering. We present and discuss magneto-optical data of the series,…
Effects of Preference for Attachment to Low-degree Nodes on the Degree Distributions of a Growing Directed Network and a Simple Food-Web Model
Volkan Sevim, Per Arne Rikvold
We study the growth of a directed network, in which the growth is constrained by the cost of adding links to the existing nodes. We propose a new preferential-attachment scheme, in…
Conductance characteristics between a normal metal and a two-dimensional Fulde-Ferrell-Larkin-Ovchinnikov superconductor: the Fulde-Ferrell state
Qinghong Cui, Chia-Ren Hu, J. Y. T. Wei +1
The Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state has received renewed interest recently due to the experimental indication of its presence in CeCoIn, a quasi 2-dimensional (2D…
Field Dependent Phase Diagram of the Quantum Spin Chain (CH3)2NH2CuCl3
M. B. Stone, W. Tian, T. P. Murphy +2
Although (CH3)2NH2CuCl3 (MCCL) was first examined in the 1930's [1], there are open questions regarding the magnetic dimensionality and nature of the magnetic properties. MCCL is p…