Instructive discussion of an effective block algorithm for baryon-baryon correlatorsWe describe an approach for the efficient calculation of a large number of four-point correlation functions for various baryon-baryon (BB) channels, which are the primary quantities for studying the…Hidekatsu Nemura·Oct 4, 2015SaveLearn
Excited-state energies and scattering phase shifts from lattice QCD with the stochastic LapH methodRecent results in computing excited-state energies and meson-meson scattering phase shifts in lattice QCD are presented. A stochastic method of treating the low-lying modes of quark propagation that…Colin Morningstar, John Bulava, Brendan Fahy et al.·Oct 1, 2015SaveLearn
Monte Carlo study of Lefschetz thimble structure in one-dimensional Thirring model at finite densityWe consider the one-dimensional massive Thirring model formulated on the lattice with staggered fermions and an auxiliary compact vector (link) field, which is exactly solvable and shows a phase…Hirotsugu Fujii, Syo Kamata, Yoshio Kikukawa·Sep 30, 2015SaveLearn
Charm Degrees of Freedom in Quark Gluon PlasmaLattice QCD studies on fluctuations and correlations of charm quantum number have established that deconfinement of charm degrees of freedom sets in around the chiral crossover temperature, Tc,…Swagato Mukherjee, Peter Petreczky, Sayantan Sharma·Sep 29, 2015SaveLearn
Singlet baryons in the graded symmetry approach to partially quenched QCDProgress in the calculation of the electromagnetic properties of baryon excitations in lattice QCD is presenting new challenges in the determination of sea-quark loop contributions to matrix…J. M. M. Hall, D. B. Leinweber·Sep 28, 2015SaveLearn
Lefschetz thimble structure in one-dimensional lattice Thirring model at finite densityWe investigate Lefschetz thimble structure of the complexified path-integration in the one-dimensional lattice massive Thirring model with finite chemical potential. The lattice model is formulated…H. Fujii, S. Kamata, Y. Kikukawa·Sep 28, 2015SaveLearn
Relativistic, model-independent, multichannel 22 transition amplitudes in a finite volumeWe derive formalism for determining 2 + J 2 infinite-volume transition amplitudes from finite-volume matrix elements. Specifically, we present a relativistic,…Raúl A. Briceño, Maxwell T. Hansen·Sep 28, 2015SaveLearn
An efficient algorithm for numerical computations of continuous densities of statesIn Wang-Landau type algorithms, Monte-Carlo updates are performed with respect to the density of states, which is iteratively refined during simulations. The partition function and thermodynamic…Kurt Langfeld, Biagio Lucini, Roberto Pellegrini et al.·Sep 28, 2015SaveLearn
Lattice Calculation of the Connected Hadronic Light-by-Light Contribution to the Muon Anomalous Magnetic MomentThe anomalous magnetic moment of muon, g-2, is a very precisely measured quantity. However, the current measurement disagrees with standard model by about 3 standard deviations. Hadronic vacuum…Luchang Jin, Thomas Blum, Norman Christ et al.·Sep 28, 2015SaveLearn
Physical observables from boundary artifacts: scalar glueball in Yang-Mills theoryBy relating the functional averages of a generic scalar operator in simulations with Open (O) and Periodic (P) boundary conditions (BCs) respectively for SU(3) lattice gauge theory, we show that…Abhishek Chowdhury, A. Harindranath, Jyotirmoy Maiti·Sep 26, 2015SaveLearn
Perturbative results for two and three particle threshold energies in finite volumeWe calculate the energy of the state closest to threshold for two and three identical, spinless particles confined to a cubic spatial volume with periodic boundary conditions and with zero total…Maxwell T. Hansen, Stephen R. Sharpe·Sep 26, 2015SaveLearn
Renormalization of the Polyakov loop with gradient flowWe use the gradient flow for the renormalization of the Polyakov loop in various representations. Using 2+1 flavor QCD with highly improved staggered quarks and lattices with temporal extents of…P. Petreczky, H. -P. Schadler·Sep 25, 2015SaveLearn
Masses, decay constants and electromagnetic form-factors with twisted boundary conditionsWe discuss some of the effects of twisted boundary conditions in finite volume using continuum SU(3) Chiral Perturbation Theory. We point out how broken cubic symmetry affects the definitions of…Johan Bijnens, Johan Relefors·Sep 24, 2015SaveLearn
Hadronic matrix elements of neutral-meson mixing through lattice QCDNeutral-meson mixing is loop suppressed in the Standard Model, leading to the possibility of enhanced sensitivity to new physics. The uncertainty in Standard Model predictions for B-meson…C. C. Chang·Sep 23, 2015SaveLearn
Hagedorn spectrum and equation of state of Yang-Mills theoriesWe present a novel lattice calculation of the equation of state of SU(2) Yang-Mills theory in the confining phase. We show that a gas of massive, non-interacting glueballs describes remarkably well…Michele Caselle, Alessandro Nada, Marco Panero·Sep 23, 2015SaveLearn
(Approximate) Low-Mode Averaging with a new Multigrid EigensolverWe present a multigrid based eigensolver for computing low-modes of the Hermitian Wilson Dirac operator. For the non-Hermitian case multigrid methods have already replaced conventional Krylov…Gunnar Bali, Sara Collins, Andreas Frommer et al.·Sep 23, 2015SaveLearn
Gauge fixing and the gluon propagator in renormalizable xi gaugesCovariant Rξ gauge fixing is notoriously difficult for large lattice volumes, large ξ and small Nc. We thoroughly test different convergence techniques, which allows the gauge fixing of…Pedro Bicudo, Daniele Binosi, Nuno Cardoso et al.·Sep 22, 2015SaveLearn
Topological Susceptibility from SlabsIn quantum field theories with topological sectors, a non-perturbative quantity of interest is the topological susceptibility chit. In principle it seems straightforward to measure chit by means of…Wolfgang Bietenholz, Philippe de Forcrand, Urs Gerber·Sep 22, 2015SaveLearn
Magnetic Catalysis in GrapheneOne of the most important developments in condensed matter physics in recent years has been the discovery and characterization of graphene. A two-dimensional layer of Carbon arranged in a hexagonal…Christopher Winterowd, Carleton DeTar, Savvas Zafeiropoulos·Sep 22, 2015SaveLearn
B Kl+l- decay form factors from three-flavor lattice QCDWe compute the form factors for the B Kl+l- semileptonic decay process in lattice QCD using gauge-field ensembles with 2+1 flavors of sea quark, generated by the MILC Collaboration. The…Jon A. Bailey, A. Bazavov, C. Bernard et al.·Sep 21, 2015SaveLearn
The pion quasiparticle in the low-temperature phase of QCDWe investigate the properties of the pion quasiparticle in the low-temperature phase of two-flavor QCD on the lattice with support from chiral effective theory. We find that the pion quasiparticle…Bastian B. Brandt, Anthony Francis, Harvey B. Meyer et al.·Sep 21, 2015SaveLearn
Lattice QCD and the Balkan physicists contributionThis is a paper based on the invited talk the author gave at the 9th Balkan Physical Union conference. It contains some of the main achievements of lattice QCD simulations followed by a list of…Artan Borici·Sep 19, 2015SaveLearn
The curvature of the freeze-out line in heavy ion collisionsWe calculate the mean and variance of net-baryon number and net-electric charge distributions from Quantum Chromodynamics (QCD) using a next-to-leading order Taylor expansion in terms of temperature…A. Bazavov, H. -T. Ding, P. Hegde et al.·Sep 18, 2015SaveLearn
Connection between centre vortices and instantons through gauge-field smoothingA recent lattice study of the Landau-gauge overlap quark propagator has shown a connection between centre vortices and dynamical chiral symmetry breaking in SU(3) gauge theory. We further…Amalie Trewartha, Waseem Kamleh, Derek Leinweber·Sep 18, 2015SaveLearn
Grand canonical ensemble, multi-particle wave functions, scattering data, and lattice field theoriesWe show that information about scattering data of a quantum field theory can be obtained from studying the system at finite density and low temperatures. In particular we consider models formulated…Falk Bruckmann, Christof Gattringer, Thomas Kloiber et al.·Sep 17, 2015SaveLearn