Baryon magnetic moments: Symmetries and relationsMagnetic moments of the octet baryons are computed using lattice QCD in background magnetic fields, including the first treatment of the magnetically coupled Sigma-Lambda system. Although the…Assumpta Parreno, Martin J. Savage, Brian C. Tiburzi et al.·Sep 5, 2017SaveLearn
Most Strange Dibaryon from Lattice QCDThe ΩΩ system in the 1S0 channel (the most strange dibaryon) is studied on the basis of the (2+1)-flavor lattice QCD simulations with a large volume (8.1 fm)3 and nearly physical pion mass…Shinya Gongyo, Kenji Sasaki, Sinya Aoki et al.·Sep 3, 2017SaveLearn
First lattice QCD study of the gluonic structure of light nucleiThe role of gluons in the structure of the nucleon and light nuclei is investigated using lattice quantum chromodynamics (QCD) calculations. The first moment of the unpolarised gluon distribution is…Frank Winter, William Detmold, Arjun S. Gambhir et al.·Sep 1, 2017SaveLearn
A confinement criterion for gauge theories with matter fieldsA generalization of the Wilson loop area-law criterion is proposed, which is applicable to gauge theories with matter in the fundamental representation of the gauge group. This new criterion, like…Jeff Greensite, Kazue Matsuyama·Aug 29, 2017SaveLearn
Estimates of Scaling Violations for Pure SU(2) LGTWe investigate the approach of pure SU(2) lattice gauge theory with the Wilson action to its continuum limit using the deconfining transition, Luescher's gradient flow, and the cooling flow to set…Bernd A. Berg, David Clarke·Aug 28, 2017SaveLearn
Status of Complex LangevinI review the status of the Complex Langevin method, which was invented to make simulations of models with complex action feasible. I discuss the mathematical justification of the procedure, as well…Erhard Seiler·Aug 28, 2017SaveLearn
A finite-density transition line for QCD with 695 MeV dynamical fermionsWe apply the relative weights method to SU(3) gauge theory with staggered fermions of mass 695 MeV at a set of temperatures in the range 151 T 267 MeV, to obtain an effective Polyakov line…Jeff Greensite, Roman Höllwieser·Aug 27, 2017SaveLearn
Numerical study of the 2+1d Thirring model with U(2N)-invariant fermionsIn 2+1 dimensions the global U(2N) symmetry associated with massless Dirac fermions is broken to U(N)(N) by a parity-invariant mass. I will show how to adapt the domain wall formulation…Simon Hands·Aug 25, 2017SaveLearn
Topology and strong four fermion interactions in four dimensionsWe study massless fermions interacting through a particular four fermion term in four dimensions. Exact symmetries prevent the generation of bilinear fermion mass terms. We determine the structure of…Simon Catterall, Nouman Butt·Aug 22, 2017SaveLearn
Centre vortex removal restores chiral symmetryThe influence of centre vortices on dynamical chiral symmetry breaking is investigated through the light hadron spectrum on the lattice. Recent studies of the quark propagator and other quantities…Amalie Trewartha, Waseem Kamleh, Derek Leinweber·Aug 22, 2017SaveLearn
Isoscalar ππ, KK, ηη scattering and the σ, f0, f2 mesons from QCDWe present the first lattice QCD study of coupled isoscalar ππ,KK,ηη S- and D-wave scattering extracted from discrete finite-volume spectra computed on lattices which have a value of…Raul A. Briceno, Jozef J. Dudek, Robert G. Edwards et al.·Aug 20, 2017SaveLearn
Computation of hybrid static potentials in SU(3) lattice gauge theoryWe compute hybrid static potentials in SU(3) lattice gauge theory. We present a method to generate a large set of suitable creation operators with defined quantum numbers from elementary building…Christian Reisinger, Stefano Capitani, Owe Philipsen et al.·Aug 18, 2017SaveLearn
Equivalence of Meson Scattering Amplitudes in Strong Coupling Lattice and Flat Space String TheoryWe consider meson scattering in the framework of the lattice strong coupling expansion. In particular we derive an expression for the 4-point function of meson operators in the planar limit of scalar…Adi Armoni, Edwin Ireson, Davide Vadacchino·Aug 17, 2017SaveLearn
Improved Parton Distribution Functions at Physical Pion MassWe present the first lattice results on isovector unpolarized and longitudinally polarized parton distribution functions (PDFs) at physical pion mass. The PDFs are obtained using the large-momentum…Huey-Wen Lin, Jiunn-Wei Chen, Tomomi Ishikawa et al.·Aug 17, 2017SaveLearn
Skewness and kurtosis of net baryon-number distributions at small values of the baryon chemical potentialWe present results for the ratios of mean (MB), variance (σB2), skewness (SB) and kurtosis (κB) of net baryon-number fluctuations obtained in lattice QCD calculations with a physical…HotQCD Collaboration, A. Bazavov, H. -T. Ding et al.·Aug 16, 2017SaveLearn
Looking behind the Standard Model with lattice gauge theoryModels for what may lie behind the Standard Model often require non-perturbative calculations in strongly coupled field theory. This creates opportunities for lattice methods, to obtain quantities of…Benjamin Svetitsky·Aug 16, 2017SaveLearn
Continuum limit of hyperon vector coupling f1(0) from 2+1 flavor domain wall QCDWe determine the hyperon vector couplings f1(0) for Σ-→ nl-νl and Ξ0→Σ+l-νl semileptonic decays in the continuum limit with (2+1)-flavors of…Shoichi Sasaki·Aug 14, 2017SaveLearn
Neutral kaon mixing beyond the Standard Model with nf=2+1 chiral fermions part II: Non Perturbative Renormalisation of the ΔF=2 four-quark operatorsWe compute the renormalisation factors (Z-matrices) of the ΔF=2 four-quark operators needed for Beyond the Standard Model (BSM) kaon mixing. We work with nf=2+1 flavours of Domain-Wall fermions…P. A. Boyle, N. Garron, R. J. Hudspith et al.·Aug 11, 2017SaveLearn
Testing Fermion Universality at a Conformal Fixed PointUniversality of various fermion formulations is well established in QCD-like theories defined around the perturbative g2=0 fixed point. These arguments do not apply for conformal systems that…Anna Hasenfratz, Claudio Rebbi, Oliver Witzel·Aug 10, 2017SaveLearn
Canonical simulations with worldlines: an exploratory study in ϕ42 lattice field theoryIn this letter we explore the perspectives for canonical simulations in the worldline formulation of a lattice field theory. Using the charged ϕ4 field in two dimensions as an example we present…Oliver Orasch, Christof Gattringer·Aug 9, 2017SaveLearn
Correlations of Energy-Momentum Tensor via Gradient Flow in SU(3) Yang-Mills Theory at Finite TemperatureEuclidean two-point correlators of the energy-momentum tensor (EMT) in SU(3) gauge theory on the lattice are studied on the basis of the Yang-Mills gradient flow. The entropy density and the specific…Masakiyo Kitazawa, Takumi Iritani, Masayuki Asakawa et al.·Aug 4, 2017SaveLearn
Improved thermodynamics of SU(2) gauge theoryIn this work we present the results of our investigation about the thermodynamics of SU(2) gauge theory. We employ a Symanzik improved action to reduce strongly the discretisations effects, and we…Pietro Giudice, Stefano Piemonte·Aug 3, 2017SaveLearn
Critical flavour number of the Thirring model in three dimensionsThe Thirring model is a four-fermion theory with a current-current interaction and U(2N) chiral symmetry. It is closely related to three-dimensional QED and other models used to describe properties…Björn H. Wellegehausen, Daniel Schmidt, Andreas Wipf·Aug 3, 2017SaveLearn
Comparison of topological charge definitions in Lattice QCDIn this paper, we show a comparison of different definitions of the topological charge on the lattice. We concentrate on one small-volume ensemble with 2 flavours of dynamical, maximally twisted mass…Constantia Alexandrou, Andreas Athenodorou, Krzysztof Cichy et al.·Aug 2, 2017SaveLearn
Perturbative contributions to Wilson loops in twisted lattice boxes and reduced modelsWe compute the perturbative expression of Wilson loops up to order g4 for SU(N) lattice gauge theories with Wilson action on a finite box with twisted boundary conditions. Our formulas are valid…Margarita García Pérez, Antonio González-Arroyo, Masanori Okawa·Aug 2, 2017SaveLearn