Nucleon resonance structure in the finite volume of lattice QCDAn approach for relating the nucleon resonances extracted from πN reaction data to lattice QCD calculations has been developed by using the finite-volume Hamiltonian method. Within models of πN…Jia-Jun Wu, H. Kamano, T. -S. H. Lee et al.·Nov 18, 2016SaveLearn
Excluded-volume effects for a hadron gas in Yang-Mills theoryWhen the multiplicities of particles produced in heavy-ion collisions are fitted to the hadron-resonance-gas model, excluded-volume effects play a significant role. In this work, we study the impact…Paolo Alba, Wanda Maria Alberico, Alessandro Nada et al.·Nov 17, 2016SaveLearn
Charmed Meson Scattering from Lattice QCDState-of-the-art lattice QCD calculations of scattering amplitudes in coupled-channel Dπ, Dη and DsK scattering, as well elastic DK scattering are discussed. The methodology employed…Graham Moir·Nov 17, 2016SaveLearn
The determination of αs by the ALPHA collaborationWe review the ALPHA collaboration strategy for obtaining the QCD coupling at high scale. In the three-flavor effective theory it avoids the use of perturbation theory at α> 0.2 and at the same time…Mattia Bruno, Mattia Dalla Brida, Patrick Fritzsch et al.·Nov 17, 2016SaveLearn
Landau Levels in Lattice QCDThe spectrum of the two-dimensional continuum Dirac operator in the presence of a uniform background magnetic field consists of Landau levels, which are degenerate and separated by gaps. On the…Falk Bruckmann, Gergely Endrodi, Matteo Giordano et al.·Nov 17, 2016SaveLearn
Scalar QCD at nonzero densityWe study scalar QCD at nonzero density in the strong coupling limit. It has a sign problem which looks structurally similar to the one in QCD. We show first data for the reweighting factor. After…Falk Bruckmann, Jacob Wellnhofer·Nov 17, 2016SaveLearn
First experience with classical-statistical real-time simulations of anomalous transport with overlap fermionsWe present first results of classical-statistical real-time simulations of anomalous transport phenomena with overlap fermions. We find that even on small lattices overlap fermions reproduce the…P. V. Buividovich, S. N. Valgushev·Nov 16, 2016SaveLearn
Locality and Efficient Evaluation of Lattice Composite Fields: Overlap-Based Gauge OperatorsWe propose a novel general approach to locality of lattice composite fields, which in case of QCD involves locality in both quark and gauge degrees of freedom. The method is applied to gauge…Andrei Alexandru, Ivan Horváth·Nov 15, 2016SaveLearn
Gluons at finite temperatureThe gluon propagator is investigated at finite temperature via lattice simulations. In particular, we discuss its interpretation as a massive-type bosonic propagator. Moreover, we compute the…P. J. Silva, O. Oliveira, D. Dudal et al.·Nov 15, 2016SaveLearn
Towards overcoming the Monte Carlo sign problem with tensor networksThe study of lattice gauge theories with Monte Carlo simulations is hindered by the infamous sign problem that appears under certain circumstances, in particular at non-zero chemical potential. So…Mari Carmen Bañuls, Krzysztof Cichy, J. Ignacio Cirac et al.·Nov 15, 2016SaveLearn
Further Study of BRST-Symmetry Breaking on the LatticeWe evaluate the so-called Bose-ghost propagator Q(p2) for SU(2) gauge theory in minimal Landau gauge, considering lattice volumes up to 1204 and physical lattice extents up to 13.5 f. In…Attilio Cucchieri, Tereza Mendes·Nov 15, 2016SaveLearn
Current status of K in lattice QCDWe present the current status of K evaluated directly from the standard model using lattice QCD inputs. The lattice QCD inputs include BK, ξ0, ξ2, |Vus|, mc(mc),…Weonjong Lee·Nov 14, 2016SaveLearn
Role of the strange quark in the rho(770) mesonRecently, the GWU lattice group has evaluated high-precision phase-shift data for ππ scattering in the I = 1, J = 1 channel. Unitary Chiral Perturbation Theory describes these data well around…R. Molina, D. Guo, B. Hu et al.·Nov 14, 2016SaveLearn
Non-equilibration of topological charge and its effectsIn QCD simulations at small lattice spacings, the topological charge Q evolves very slowly and, if this quantity is not properly equilibrated, we could get incorrect results for physical quantities,…Claude Bernard, Doug Toussaint·Nov 14, 2016SaveLearn
On the nature of an excited stateIn many lattice simulations with dynamical quarks, radial or orbital excitations of hadrons lie near multihadron thresholds: it makes the extraction of excited states properties more challenging and…Benoit Blossier, Antoine Gérardin·Nov 14, 2016SaveLearn
New approach to canonical partition functions computation in Nf=2 lattice QCD at finite baryon densityWe propose and test a new approach to computation of canonical partition functions in lattice QCD at finite density. We suggest a few steps procedure. We first compute numerically the quark number…V. G. Bornyakov, D. L. Boyda, V. A. Goy et al.·Nov 14, 2016SaveLearn
Kaon semileptonic decays with Nf=2+1+1 HISQ fermions and physical light-quark massesWe discuss the reduction of errors in the calculation of the form factor f+K π(0) with HISQ fermions on the Nf=2+1+1 MILC configurations from increased statistics on some key ensembles, new…E. Gamiz, A. Bazavov, C. Bernard et al.·Nov 13, 2016SaveLearn
Meson masses and decay constants at large NMeson masses and decay constants in the large N limit of SU(N) gauge theory are determined using the twisted Eguchi-Kawai reduced model. To this end, we make use of a recently defined smearing…Margarita García Pérez, Antonio González-Arroyo, Masanori Okawa·Nov 13, 2016SaveLearn
Charmed-Bottom Mesons from Lattice QCDWe present ground state spectra of mesons containing a charm and a bottom quark. For the charm quark we use overlap valence quarks while a non-relativistic formulation is utilized for the bottom…Nilmani Mathur, M. Padmanath, Randy Lewis·Nov 13, 2016SaveLearn
Comparison of algorithms for solving the sign problem in the O(3) model in 1+1 dimensions at finite chemical potentialWe study three possible ways to circumvent the sign problem in the O(3) nonlinear sigma model in 1+1 dimensions. We compare the results of the worm algorithm to complex Langevin and multiparameter…Sandor D. Katz, Ferenc Niedermayer, Daniel Nogradi et al.·Nov 12, 2016SaveLearn
Check of a new non-perturbative mechanism for elementary fermion mass generationWe consider a field theoretical model where a SU(2) fermion doublet, subjected to non-Abelian gauge interactions, is also coupled to a complex scalar field doublet via a Yukawa and an irrelevant…Stefano Capitani, Giulia Maria De Divitiis, Petros Dimopoulos et al.·Nov 12, 2016SaveLearn
Polyakov line actions from SU(3) lattice gauge theory with dynamical fermions via relative weightsWe extract an effective Polyakov line action from an underlying SU(3) lattice gauge theory with dynamical fermions via the relative weights method. The center-symmetry breaking terms in the effective…Roman Höllwieser, Jeff Greensite·Nov 12, 2016SaveLearn
Functional Fit Approach (FFA) for Density of States method: SU(3) spin system and SU(3) lattice gauge theory with static color sourcesWe apply a recently developed variant of the Density of States (DoS) method, the so-called Functional Fit Approach (FFA) to two different models: the SU(3) spin model and SU(3) lattice gauge theory…Mario Giuliani·Nov 11, 2016SaveLearn
Gluon and Ghost Dynamics from Lattice QCDThe two point gluon and ghost correlation functions and the three gluon vertex are investigated, in the Landau gauge, using lattice simulations. For the two point functions, we discuss the approach…O. Oliveira, A. G. Duarte, D. Dudal et al.·Nov 11, 2016SaveLearn
Euclidean relativistic quantum mechanics - scattering asymptotic conditionsWe discuss the formulation of the scattering asymptotic condition in a relativistic quantum theory formulated in terms of reflection positive Euclidean Green functions.W. N. Polyzou, Gordon Aiello·Nov 11, 2016SaveLearn