Multigrid approach in shifted linear systems for the non-degenerated twisted mass operatorApplication of multigrid solvers in shifted linear systems is studied. We focus on accelerating the rational approximation needed for simulating single flavor operators. This is particularly useful,…Constantia Alexandrou, Simone Bacchio, Jacob Finkenrath·May 24, 2018SaveLearn
Mass-improvement of the vector current in three-flavor QCDWe determine two improvement coefficients which are relevant to cancel mass-dependent cutoff effects in correlation functions with operator insertions of the non-singlet local QCD vector current.…Patrick Fritzsch·May 18, 2018SaveLearn
Themodynamics for pure SU(2) gauge theory using gradient flowWe study the equation of state of pure SU(2) gauge theory using Monte Carlo simulations. The scale-setting of lattice parameters has been carried by using the gradient flow. We propose a reference…Takehiro Hirakida, Etsuko Itou, Hiroaki Kouno·May 18, 2018SaveLearn
Chiral symmetry restoration at finite temperature within the Hamiltonian approach to QCD in Coulomb gaugeThe chiral phase transition of the quark sector of QCD is investigated within the Hamiltonian approach in Coulomb gauge. Finite temperature T is introduced by compactifying one spatial dimension,…Markus Quandt, Ehsan Ebadati, Hugo Reinhardt et al.·May 18, 2018SaveLearn
Determination of quark masses from nf=4 lattice QCD and the RI-SMOM intermediate schemeWe determine the charm and strange quark masses in the MS scheme, using nf=2+1+1 lattice QCD calculations with highly improved staggered quarks (HISQ) and the RI-SMOM…A. T. Lytle, C. T. H. Davies, D. Hatton et al.·May 16, 2018SaveLearn
Chiral observables and topology in hot QCD with two families of quarksWe present results on QCD with four dynamical flavors in the temperature range 150 MeV T 500 MeV. We have performed lattice simulations with Wilson fermions at maximal twist and…Florian Burger, Ernst-Michael Ilgenfritz, Maria Paola Lombardo et al.·May 15, 2018SaveLearn
Variational study of U(1) and SU(2) lattice gauge theories with Gaussian states in 1+1 dimensionsWe introduce a method to investigate the static and dynamic properties of both Abelian and non-Abelian lattice gauge models in 1+1 dimensions. Specifically, we identify a set of transformations that…P. Sala, T. Shi, S. Kühn et al.·May 14, 2018SaveLearn
A simple approach towards the sign problem using path optimisationWe suggest an approach for simulating theories with a sign problem that relies on optimisation of complex integration contours that are not restricted to lie along Lefschetz thimbles. To that end we…Francis Bursa, Michael Kroyter·May 13, 2018SaveLearn
Finite-volume correction on the hadronic vacuum polarization contribution to muon g-2 in lattice QCDWe study the finite-volume correction on the hadronic vacuum polarization contribution to the muon g-2 (aμ hvp) in lattice QCD at (near) physical pion mass using two different volumes:…Taku Izubuchi, Yoshinobu Kuramashi, Christoph Lehner et al.·May 11, 2018SaveLearn
Higher order fluctuations and correlations of conserved charges from lattice QCDWe calculate several diagonal and non-diagonal fluctuations of conserved charges in a system of 2+1+1 quark flavors with physical masses, on a lattice with size 483×12. Higher order…Szabolcs Borsanyi, Zoltan Fodor, Jana N. Guenther et al.·May 11, 2018SaveLearn
Anomalous finite-size scaling at thermal first-order transitions in systems with disordered boundary conditionsWe investigate the equilibrium and off-equilibrium behaviors of systems at thermal first-order transitions (FOTs) when the boundary conditions favor one of the two phases. As a theoretical laboratory…Haralambos Panagopoulos, Andrea Pelissetto, Ettore Vicari·May 11, 2018SaveLearn
Lattice QCD study of the H dibaryon using hexaquark and two-baryon interpolatorsWe present a lattice QCD spectroscopy study in the isospin singlet, strangeness -2 sectors relevant for the conjectured H dibaryon. We employ both local and bilocal interpolating operators to…A. Francis, J. R. Green, P. M. Junnarkar et al.·May 10, 2018SaveLearn
Complex Langevin calculations in finite density QCD at large μ/T with the deformation techniqueIt is well known that investigating QCD at finite density by standard Monte Carlo methods is extremely difficult due to the sign problem. Some years ago, the complex Langevin method with gauge…Keitaro Nagata, Jun Nishimura, Shinji Shimasaki·May 10, 2018SaveLearn
Effective Field Theories in a Finite VolumeIn this talk I present the formalism we have used to analyze Lattice data on two meson systems by means of effective field theories. In particular I present the results obtained from a reanalysis of…A. Martinez Torres, S. Prelovsek, E. Oset et al.·May 10, 2018SaveLearn
A Single Right-Moving Free Fermion Mode on an Ultra-Local 1+1d Spacetime LatticeDefining a Chiral Fermion Theory on a lattice has presented an ongoing challenge both in Condensed Matter physics and in Lattice Gauge Theory. In this paper, we demonstrate that a chiral free-fermion…Michael DeMarco, Xiao-Gang Wen·May 9, 2018SaveLearn
Exploiting the hopping parameter expansion in the hybrid Monte Carlo (HMC) simulation of lattice QCD with two degenerate flavours of Wilson fermionsWe show how the hopping parameter expansion at order κ2 and κ4 can be exploited in the simulation of lattice QCD with two flavours of degenerate Wilson fermions. A natural extension of this…Martin Hasenbusch·May 9, 2018SaveLearn
Curvature of the pseudocritical line in QCD: Taylor expansion matches analytic continuationWe determine the curvature of the pseudo-critical line of Nf = 2 + 1 QCD with physical quark masses via Taylor expansion in the quark chemical potentials. We adopt a discretization based on stout…Claudio Bonati, Massimo D'Elia, Francesco Negro et al.·May 8, 2018SaveLearn
Systematics of the HAL QCD Potential at Low Energies in Lattice QCDThe ΞΞ interaction in the 1S0 channel is studied to examine the convergence of the derivative expansion of the non-local HAL QCD potential at the next-to-next-to-leading order (N2LO). We…Takumi Iritani, Sinya Aoki, Takumi Doi et al.·May 7, 2018SaveLearn
Positive representations of complex distributions on groupsA normalizable complex distribution P(x) on a manifold M can be regarded as a complex weight, thereby allowing to define expectation values of observables A(x) defined on…L. L. Salcedo·May 4, 2018SaveLearn
Symanzik Improvement with Dynamical Charm: A 3+1 Scheme for Wilson QuarksWe discuss the problem of lattice artefacts in QCD simulations enhanced by the introduction of dynamical charmed quarks. In particular, we advocate the use of a massive renormalization scheme with a…Patrick Fritzsch, Rainer Sommer, Felix Stollenwerk et al.·May 4, 2018SaveLearn
Renormalization of Wilson-line operators in the presence of nonzero quark massesIn this paper, we examine the effect of nonzero quark masses on the renormalization of gauge-invariant nonlocal quark bilinear operators, including a finite-length Wilson line (called Wilson-line…G. Spanoudes, H. Panagopoulos·May 3, 2018SaveLearn
Finite-volume effects due to spatially non-local operatorsSpatially non-local matrix elements are useful lattice-QCD observables in a variety of contexts, for example in determining hadron structure. To quote credible estimates of the systematic…Raúl A. Briceño, Juan V. Guerrero, Maxwell T. Hansen et al.·May 2, 2018SaveLearn
Nonperturbatively-renormalized glue momentum fraction at physical pion mass from Lattice QCDWe present the first nonperturbatively-renormalized determination of the glue momentum fraction x g in the nucleon, based on lattice-QCD simulations at physical pion mass using the…Yi-Bo Yang, Ming Gong, Jian Liang et al.·May 1, 2018SaveLearn
Spin Polarized Non-Relativistic Fermions in 1+1 DimensionsWe study by Monte Carlo methods the thermodynamics of a spin polarized gas of non-relativistic fermions in 1+1 dimensions. The main result of this work is that our action suffers no significant sign…Andrei Alexandru, Paulo F. Bedaque, Neill C. Warrington·Apr 30, 2018SaveLearn
Color screening in (2+1)-flavor QCDWe study correlation functions of spatially separated static quark-antiquark pairs in (2+1)-flavor QCD in order to investigate onset and nature of color screening at high temperatures. We perform…TUMQCD collaboration, Alexei Bazavov, Nora Brambilla et al.·Apr 27, 2018SaveLearn