Parallel tempering algorithm for integration over Lefschetz thimblesThe algorithm based on integration over Lefschetz thimbles is a promising method to resolve the sign problem for complex actions. However, this algorithm often meets a difficulty in actual Monte…Masafumi Fukuma, Naoya Umeda·Mar 2, 2017SaveLearn
Screening masses in strong external magnetic fieldsWe present results for the (color)magnetic and (color)electric screening masses of the Quark-Gluon Plasma in the presence of an external magnetic field. The screening masses are extracted from the…Claudio Bonati, Massimo D'Elia, Marco Mariti et al.·Mar 2, 2017SaveLearn
Finite-representation approximation of lattice gauge theories at the continuum limit with tensor networksIt has been established that Matrix Product States can be used to compute the ground state and single-particle excitations and their properties of lattice gauge theories at the continuum limit.…Boye Buyens, Simone Montangero, Jutho Haegeman et al.·Feb 28, 2017SaveLearn
Glueball spectrum from Nf=2 lattice QCD study on anisotropic latticesThe lowest-lying glueballs are investigated in lattice QCD using Nf=2 clover Wilson fermion on anisotropic lattices. We simulate at two different and relatively heavy quark masses, corresponding…Wei Sun, Long-Cheng Gui, Ying Chen et al.·Feb 27, 2017SaveLearn
BSM Kaon Mixing at the Physical PointWe present new preliminary results for bag parameters and ratios of the BSM kaon mixing operators measured at the physical point. The results are obtained from simulations of domain wall fermion QCD…Peter Boyle, Nicolas Garron, Julia Kettle et al.·Feb 27, 2017SaveLearn
Hadronic coupling constants of gσππ in lattice QCDWe investigate the coupling constant gσππ for the hadronic decay σππ only using the relevant three-point function, which is evaluated by the moving-wall source technique with a pretty good…Lingyun Wang, Ziwen Fu, Hang Chen·Feb 27, 2017SaveLearn
Lattice QCD static potentials of the meson-meson and tetraquark systems computed with both quenched and full QCDWe revisit the static potential for the Q Q Q Q system using SU(3) lattice simulations, studying both the colour singlets groundstate and first excited state. We consider geometries where…P. Bicudo, M. Cardoso, O. Oliveira et al.·Feb 24, 2017SaveLearn
Parity doubling in two-flavor SU(2) at high temperatureWe study the mass spectrum of mesons at high temperature in SU(2) gauge theory with two flavors of Dirac fundamental fermions. Numerical simulations are carried out on anisotropic lattices using…Jong-Wan Lee, Biagio Lucini, Maurizio Piai·Feb 24, 2017SaveLearn
Platform independent profiling of a QCD codeThe supercomputing platforms available for high performance computing based research evolve at a great rate. However, this rapid development of novel technologies requires constant adaptations and…Marina Krstic Marinkovic, Luka Stanisic·Feb 22, 2017SaveLearn
Flux tubes in the QCD vacuumThe hypothesis that the QCD vacuum can be modeled as a dual superconductor is a powerful tool to describe the distribution of the color field generated by a quark-antiquark static pair and, as such,…Paolo Cea, Leonardo Cosmai, Francesca Cuteri et al.·Feb 21, 2017SaveLearn
Large mass hierarchies from strongly-coupled dynamicsMotivated by the absence of signals of new physics at the LHC, which seems to imply the presence of large mass hierarchies, we investigate the theoretical possibility that these could arise…Andreas Athenodorou, Ed Bennett, Georg Bergner et al.·Feb 21, 2017SaveLearn
Non-perturbative determination of the Λ-parameter in the pure SU(3) gauge theory from the twisted gradient flow couplingWe evaluate the Λ-parameter in the MS scheme for the pure SU(3) gauge theory with the twisted gradient flow (TGF) method. A running coupling constant gTGF2(1/L)…Ken-Ichi Ishikawa, Issaku Kanamori, Yuko Murakami et al.·Feb 21, 2017SaveLearn
Baryon interactions from lattice QCD with physical masses -- S=-2 sector --The strangeness S=-2 baryon-baryon interaction is investigated directly from the fundamental theory of the strong interaction, QCD. The HAL QCD method enables us to extract baryon interactions from…Kenji Sasaki, Sinya Aoki, Takumi Doi et al.·Feb 21, 2017SaveLearn
Positive Representations of a Class of Complex MeasuresWe study the problem of constructing positive representations of complex measures. In this paper we consider complex densities on a direct product of U(1) groups and look for representations by…Erhard Seiler, Jacek Wosiek·Feb 20, 2017SaveLearn
Effects of magnetic fields on quark-antiquark interactionsWe discuss some recent results obtained in the study of strong quark-antiquark interactions in the presence of intense external magnetic fields by means of lattice QCD simulations. We confirm…Claudio Bonati, Massimo D'Elia, Marco Mariti et al.·Feb 20, 2017SaveLearn
Phenomenology of a Composite Higgs ModelSeveral UV complete models of physics beyond the Standard Model are currently under scrutiny, their low-energy dynamics being compared with the experimental data from the LHC. Lattice simulations can…Luigi Del Debbio, Christoph Englert, Roman Zwicky·Feb 17, 2017SaveLearn
Progress in the calculation of purely leptonic D(s) -- decay constants from lattice QCDWe review recent progress in the calculation of the decay constants fD and fDs from lattice QCD. We focus particularly on simulations with Nf=2+1 and Nf=2+1+1 and simulations with…Justus Tobias Tsang·Feb 17, 2017SaveLearn
Remarks on the construction of worm algorithms for lattice field theories in worldline representationWe introduce a generalized worldline model where the partition function is a sum over configurations of a conserved flux on a d-dimensional lattice. The weights for the configurations of the…Mario Giuliani, Christof Gattringer·Feb 15, 2017SaveLearn
Third-order perturbative lattice and complex Langevin analyses of the finite-temperature equation of state of non-relativistic fermions in one dimensionWe analyze the pressure and density equations of state of unpolarized non-relativistic fermions at finite temperature in one spatial dimension. For attractively interacting regimes, we perform a…Andrew C. Loheac, Joaquin E. Drut·Feb 15, 2017SaveLearn
Nucleon Matrix Elements at Physical Pion Mass and Cost ComparisonWe report a lattice calculation of nucleon forward matrix elements on a 483 × 96 lattice at the physical pion mass and a spatial size of 5.5 fm. The 2+1 flavor dynamical fermion…Keh-Fei Liu, Jian Liang, Yi-Bo Yang·Feb 14, 2017SaveLearn
On the mass of the world-sheet `axion' in SU(N) gauge theories in 3+1 dimensionsThere is numerical evidence that the world sheet action of the confining flux tube in D=3+1 SU(N) gauge theories contains a massive excitation with 0- quantum numbers whose mass shows some decrease…Andreas Athenodorou, Michael Teper·Feb 13, 2017SaveLearn
QED Corrections to Hadronic ObservablesWhen aiming at the percent precision in hadronic quantities calculated by means of lattice simulations, isospin breaking effects become relevant. These are of two kinds: up/down mass splitting and…Agostino Patella·Feb 13, 2017SaveLearn
Baryon interactions from lattice QCD with physical masses ---S=-3 sector: XiSigma and XiLambda-XiSigma---We present lattice QCD results of baryon-baryon potentials in S=-3 sector, i.e., ΞΣ(I=3/2) potentials and ΞΛ-ΞΣcoupled channel potentials (I=1/2) by using the 2+1 flavor gauge configurations with…Noriyoshi Ishii, Sinya Aoki, Takumi Doi et al.·Feb 12, 2017SaveLearn
Pure gauge QCD flux tubes and their widths at finite temperatureWe study the flux tubes produced by static quark-antiquark, quark-quark and quark-gluon charges at finite temperature in pure gauge SU(3) lattice QCD. Our sources are static and our lattice…P. Bicudo, N. Cardoso, M. Cardoso·Feb 11, 2017SaveLearn
Twisted finite-volume corrections to Kl3 decays with partially-quenched and rooted-staggered quarksThe determination of |Vus| from kaon semileptonic decays requires the value of the form factor f+(q2=0) which can be calculated precisely on the lattice. We provide the one-loop partially…Claude Bernard, Johan Bijnens, Elvira Gámiz et al.·Feb 11, 2017SaveLearn