Positivity of the virial coefficients in lattice dimer models and upper bounds on the number of matchings on graphsUsing a relation between the virial expansion coefficients of the pressure and the entropy expansion coefficients in the case of the monomer-dimer model on infinite regular lattices, we have shown…P. Butera, P. Federbush, M. Pernici·Feb 24, 2015SaveLearn
Quantum electrodynamics in finite volume and nonrelativistic effective field theoriesElectromagnetic effects are increasingly being accounted for in lattice quantum chromodynamics computations. Because of their long-range nature, they lead to large finite-size effects over which it…Z. Fodor, C. Hoelbling, S. D. Katz et al.·Feb 24, 2015SaveLearn
Phase structure of two-color QCD at real and imaginary chemical potentials; lattice simulations and model analysesWe investigate the phase structure of two-color QCD at both real and imaginary chemical potentials mu, performing lattice simulations and analyzing the data with the Polyakov-loop extended…Takahiro Makiyama, Yuji Sakai, Takuya Saito et al.·Feb 22, 2015SaveLearn
Microscopic Origin of UA(1) Symmetry Violation in the High Temperature Phase of QCDWe investigate the low-lying eigenmodes of the Dirac matrix with the aim to gain more insight into the temperature dependence of the anomalous UA(1) symmetry. We use the overlap operator to probe…Viktor Dick, Frithjof Karsch, Edwin Laermann et al.·Feb 22, 2015SaveLearn
Lattice QCD with purely imaginary sources at zero and non-zero temperatureWe discuss various aspects and recent progress concerning lattice QCD studies in the presence of external sources. We focus, in particular, on issues regarding QCD with non-zero imaginary chemical…Massimo D'Elia·Feb 21, 2015SaveLearn
The Dyson-Schwinger equation of a link variable in lattice Landau gauge theoryWe derive the Dyson-Schwinger equation of a link variable in SU(n) lattice gauge theory in minimal Landau gauge and confront it with Monte-Carlo data for the different terms. Preliminary results for…Andre Sternbeck, Martin Schaden, Valentin Mader·Feb 20, 2015SaveLearn
Strange quark momentum fraction from overlap fermionWe present a calculation of < x >s for the strange quark in the nucleon. We also report the ratio of the strange < x > to that of u/d in the disconnected insertion which will be useful in…Mingyang Sun, Yi-Bo Yang, Keh-Fei Liu et al.·Feb 19, 2015SaveLearn
Lattice QCD with 2+1 Flavors and Open Boundaries: First Results of the Baryon SpectrumBased on CLS simulations with 2+1 flavors and open boundaries we present first results of the baryon spectrum. We report on the status of our effort related to these simulations and the chiral…Wolfgang Söldner·Feb 19, 2015SaveLearn
Solving the sign problems of the massless lattice Schwinger model with a dual formulationWe derive an exact representation of the massless Schwinger model on the lattice in terms of dual variables which are configurations of loops, dimers and plaquette occupation numbers. When expressed…Christof Gattringer, Thomas Kloiber, Vasily Sazonov·Feb 19, 2015SaveLearn
Indications of a non-trivial vacuum in the effective theory of perfect fluidsUsing lattice field theory techniques, we investigate the vacuum structure of the field theory corresponding to perfect fluid dynamics in the Lagrangian prescription. We find intriguing, but…Tommy Burch, Giorgio Torrieri·Feb 18, 2015SaveLearn
Towards the physical point hadronic vacuum polarisation from Moebius DWFWe present steps towards the computation of the leading-order hadronic contribution to the muon anomalous magnetic moment on RBC/UKQCD physical point DWF ensembles. We discuss several methods for…Marina Marinkovic, Peter Boyle, Luigi Del Debbio et al.·Feb 18, 2015SaveLearn
Non-perturbative improvement of the axial current in Nf=3 lattice QCD with Wilson fermions and tree-level improved gauge actionThe coefficient cA required for O(a) improvement of the axial current in lattice QCD with Nf=3 flavors of Wilson fermions and the tree-level Symanzik-improved gauge action is determined…John Bulava, Michele Della Morte, Jochen Heitger et al.·Feb 17, 2015SaveLearn
Partial restoration of chiral symmetry in the color flux tubeUsing the quark eigenmodes computed on the lattice with the overlap-Dirac operator, we investigate the spatial distribution of the chiral condensate around static color sources corresponding to…Takumi Iritani, Guido Cossu, Shoji Hashimoto·Feb 17, 2015SaveLearn
Calculating the chiral condensate diagrammatically at strong couplingWe calculate the chiral condensate of QCD at infinite coupling as a function of the number of fundamental fermion flavours using a lattice diagrammatic approach inspired by recent work of Tomboulis,…Alexander S. Christensen, Joyce C. Myers, Peter D. Pedersen et al.·Feb 17, 2015SaveLearn
Solution to the gauge-Higgs analyticity paradoxThe Fradkin-Shenker theorem proves analyticity in a region that connects Higgs to confinement regimes, precluding a phase transition. This conflicts with a simpler analyticity argument applicable to…Michael Grady·Feb 15, 2015SaveLearn
Multichannel 0-to-2 and 1-to-2 transition amplitudes for arbitrary spin particles in a finite volumeWe present a model-independent, non-perturbative relation between finite-volume matrix elements and infinite-volume 0→2 and 1→2 transition…Raúl A. Briceño, Maxwell T. Hansen·Feb 15, 2015SaveLearn
Study of quark mass dependence of binding energy for light nuclei in 2+1 flavor lattice QCDWe investigate the formation of light nuclei with the nuclear mass number less than or equal to four in 2+1 flavor QCD using a non-perturbative improved Wilson quark and Iwasaki gauge actions. The…Takeshi Yamazaki, Ken-ichi Ishikawa, Yoshinobu Kuramashi et al.·Feb 14, 2015SaveLearn
Nucleons and parity doubling across the deconfinement transitionIt is expected that nucleons and their parity partners become degenerate when chiral symmetry is restored. We investigate this question in the context of the thermal transition from the hadronic…Gert Aarts, Chris Allton, Simon Hands et al.·Feb 12, 2015SaveLearn
Triviality of ϕ44 in the broken phase revisitedWe define a finite size renormalization scheme for ϕ4 theory which in the thermodynamic limit reduces to the standard scheme used in the broken phase. We use it to re-investigate the question of…Tomasz Korzec, Ulli Wolff·Feb 12, 2015SaveLearn
The critical behavior of hadronic matter: Comparison of lattice and bootstrap model calculationsStatistical bootstrap model and the related concept of the limiting temperature begun the discussion about phase transitions in the hadronic matter. This was also the origin of the quark-gluon plazma…L. Turko·Feb 12, 2015SaveLearn
Wilson fermion doubling phenomenon on irregular lattice: the similarity and difference with the case of regular latticeIt is shown that the Wilson fermion doubling phenomenon on irregular lattices (simplicial complexes) does exist. This means that the irregular (not smooth) zero or soft modes exist. The statement is…S. N. Vergeles·Feb 11, 2015SaveLearn
An Ising-Anderson model of localisation in high-temperature QCDWe discuss a possible mechanism leading to localisation of the low-lying Dirac eigenmodes in high-temperature lattice QCD, based on the spatial fluctuations of the local Polyakov lines in the…Matteo Giordano, Tamas G. Kovacs, Ferenc Pittler·Feb 9, 2015SaveLearn
The electric dipole moment of the neutron from 2+1 flavor lattice QCDWe compute the electric dipole moment dn of the neutron from a fully dynamical simulation of lattice QCD with 2+1 flavors of clover fermions and nonvanishing theta term. The latter is rotated into…F. -K. Guo, R. Horsley, U. -G. Meissner et al.·Feb 8, 2015SaveLearn
Lattice QCD Thermodynamics with Physical Quark MassesOver the past few years new physics methods and algorithms as well as the latest supercomputers have enabled the study of the QCD thermodynamic phase transition using lattice gauge theory numerical…R. A. Soltz, C. DeTar, F. Karsch et al.·Feb 8, 2015SaveLearn
Finite-volume corrections to the leading-order hadronic contribution to gμ-2We present preliminary results of a 2+1-flavor study of finite-volume effects in the lattice QCD computation of the leading-order hadronic contribution to the muon anomalous magnetic moment. We also…Rehan Malak, Zoltan Fodor, Christian Hoelbling et al.·Feb 7, 2015SaveLearn