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71 papers · 1 filter
QCD Thermodynamics at and 12
the HEMCGC, MILC Collaborations
We present results from studies of high temperature QCD with two flavors of Kogut-Susskind quarks on lattices at a quark mass of and on $24^3\times 12…
Magnetization switching in nanoscale ferromagnetic grains: description by a kinetic Ising model
Howard L. Richards, Scott W. Sides, M. A. Novotny +1
The magnetic relaxation of ferromagnetic powders has been studied for many years, largely due to its importance to recording technologies. However, only recently have experiments b…
Quasiparticle dispersion of the t-J and Hubbard models
A. Moreo, S. Haas, A. Sandvik +1
The spectral weight of the two dimensional and Hubbard models has been calculated using exact diagonalization and quantum Monte Carlo techniques, a…
Latest Results from Heavy Quark Simulations
John Sloan
The status of b-bbar and c-cbar calculations, numerical and analytic, are reviewed. The extraction of alpha_s and quark masses from spectrum calculations is discussed. The NRQCD an…
Universality, Scaling and Topology with a Modified Lattice Action
J. Fingberg
We examined the effect of a complete suppression of a lattice artifact, the negative plaquettes, on physical quantities, such as the critical temperature, the string tension, the t…
Axisymmetric galaxy models wth central BHs, with an application to M32
E. E. Qian, P. T. de Zeeuw, R. P. van der Marel +1
The contour integral method of Hunter & Qian is applied to axisymmetric galaxy models in which the distribution function (DF) is of the form f=f(E,L_z), where E and L_z are the cla…
Relativistic nuclear structure effects in quasielastic neutrino scattering
Hungchong Kim, J. Piekarewicz, C. J. Horowitz
Charged-current cross sections are calculated for quasielastic neutrino and antineutrino scattering using a relativistic meson-nucleon model. We examine how nuclear-structure effec…
Cooling in QCD Spectroscopy
Robert G. Edwards, Khalil Bitar, Urs M. Heller +1
We test the cooling algorithm with gluonic and staggered hadronic spectroscopy on gauge field configurations generated with two flavors of staggered dynamical fermions. We…
Thermal Phase Transition in Mixed Action SU(3) Lattice Gauge Theory and Wilson Fermion Thermodynamics
T. Blum, C. DeTar, Urs M. Heller +3
We study the thermal phase diagram of pure SU(3) lattice gauge theory with fundamental and adjoint couplings. We improve previous estimates of the position of the bulk transition l…
SU(2) potentials in quantum gravity
W. Beirl, B. A. Berg, B. Krishnan +2
We present investigations of the potential between static charges from a simulation of quantum gravity coupled to an SU(2) gauge field on and simpli…
Two-Dimensional t-J Model at Low Electron Density
C. Stephen Hellberg, Efstratios Manousakis
The phase diagram of the two-dimensional t-J model is determined accurately at low electron density by a combination of analytic and numerical techniques. The ground state exhibits…
Preliminary heavy-light decay constants from the MILC collaboration
C. Bernard, T. Blum, A. De +10
Preliminary results from the MILC collaboration for , , , and their ratios are presented. We compute in the quenched approximation at , 6.0 and…
Two-Dimensional -Model up to Correlation Length
Sergio Caracciolo, Robert G. Edwards, Andrea Pelissetto +1
We carry out a high-precision Monte Carlo simulation of the two-dimensional -invariant -model at correlation lengths up to . Our work employs a new and powe…
New Method for the Extrapolation of Finite-Size Data to Infinite Volume
Sergio Caracciolo, Robert G. Edwards, Sabino J. Ferreira +2
We present a simple and powerful method for extrapolating finite-volume Monte Carlo data to infinite volume, based on finite-size-scaling theory. We discuss carefully its systemati…
Toward the QCD Function with Dynamical Wilson Fermions
K. M. Bitar, R. G. Edwards, U. M. Heller +2
We present data for the scaling behavior of lattice QCD with two flavors of light Wilson fermions. This is done by matching n and masses at the two lattice sizes of $16^3\t…
P-wave meson properties with Wilson quarks
M. Wingate, T. DeGrand, S. Collins +1
We describe two calculations involving P-wave mesons made of Wilson quarks: the strong coupling constant in the presence of two flavors of light dynamical fermions and the ma…
Flavor-Parity Breaking in the NJL Model with Wilson Fermions
K. M. Bitar, P. M. Vranas
The Nambu--Jona-Lasinio model is chirally symmetric. Addition of a Wilson term explicitly breaks this symmetry and leaves the model with a remaining parity-flavor symmetry. In the…
Asymptotic Scaling in the Two-Dimensional -Model at Correlation Length
Sergio Caracciolo, Robert G. Edwards, Andrea Pelissetto +1
We carry out a high-precision Monte Carlo simulation of the two-dimensional -invariant -model at correlation lengths up to . Our work employs a new and powe…
Baryon Current Matrix Elements in a Light-Front Framework
Simon Capstick, B. D. Keister
Current matrix elements and observables for electro- and photo-excitation of baryons from the nucleon are studied in a light-front framework. Relativistic effects are estimated by…
Three-dimensional model with the Chern-Simons term
Norbert Schultka, Efstratios Manousakis
We investigate the influence of the Chern-Simons term coupled to the three-dimensional model. This term endows vortices with an internal angular momentum and thus gives them…
Comment on "Monte Carlo Simulation of a First-Order Transition"
Bernd A. Berg, Ulrich H. E. Hansmann, Yuko Okamoto
We comment on a recent article by Hao and Scheraga.
Shadow Bands in the Cuprates
Stephan Haas, Adriana Moreo, Elbio Dagotto
A consequence of strong antiferromagnetic correlations in models of high-Tc cuprates is the appearance in photoemission (PES) calculations of considerable more weight above the Fer…
SU(3) Lattice Gauge Theory With Adjoint Action At Nonzero Temperature
T. Blum, Carleton DeTar, Urs M. Heller +2
We study the thermal phase diagram of pure SU(3) gauge theory with fundamental and adjoint couplings. We improve previous estimates of the position of the bulk transition line and…
Monte Carlo with Absorbing Markov Chains: Fast Local Algorithms for Slow Dynamics
M. A. Novotny
A class of Monte Carlo algorithms which incorporate absorbing Markov chains is presented. In a particular limit, the lowest-order of these algorithms reduces to the -fold way al…