Equation of state in (2+1) flavor QCD at high temperaturesWe calculate the Equation of State at high temperatures in (2+1) flavor QCD using the highly improved staggered quark (HISQ) action. We study the lattice spacing dependence of the pressure at high…Johannes Heinrich Weber, Alexei Bazavov, Peter Petreczky·Nov 30, 2018SaveLearn
Infrared Behaviour of SU(2) Gauge Theory with Nf fundamental flavoursWe review our recent results on the infrared behaviour of the SU(2) gauge theory with Nf massless fundamental flavour fermions. We have analyzed the running of the coupling in SU(2) gauge theories…Viljami Leino, Kari Rummukainen, Joni M. Suorsa et al.·Nov 29, 2018SaveLearn
Tensor network analysis of critical coupling in two dimensional ϕ4 theoryWe make a detailed analysis of the spontaneous Z2-symmetry breaking in the two dimensional real ϕ4 theory with the tensor renormalization group approach, which allows us to take the…Daisuke Kadoh, Yoshinobu Kuramashi, Yoshifumi Nakamura et al.·Nov 29, 2018SaveLearn
Expansion coefficient of the pseudo-scalar density using the gradient flow in lattice QCDWe use the Yang-Mills gradient flow to calculate the pseudo-scalar expansion coefficient cP*(tf). This quantity is a key ingredient to obtaining the chiral condensate and strange quark content…J. G. Reyes, J. Dragos, J. Kim et al.·Nov 28, 2018SaveLearn
Spectrum of the open QCD flux tube and its effective string descriptionI perform a high precision measurement of the static quark-antiquark potential in three-dimensional SU(N) gauge theory with N=2 to 6. The results are compared to the effective string theory…Bastian B. Brandt·Nov 28, 2018SaveLearn
High Precision Statistical Landau Gauge Lattice Gluon Propagator ComputationWe report on results for the Landau gauge gluon propagator computed from large statistical ensembles and look at the compatibility of the results with the Gribov-Zwanziger tree level prediction for…David Dudal, Orlando Oliveira, Paulo J. Silva·Nov 28, 2018SaveLearn
Lattice Computation of the Ghost Propagator in Linear Covariant GaugesWe discuss the subtleties concerning the lattice computation of the ghost propagator in linear covariant gauges, and present preliminary numerical results.Attilio Cucchieri, David Dudal, Tereza Mendes et al.·Nov 28, 2018SaveLearn
Precision computation of hybrid static potentials in SU(3) lattice gauge theoryWe perform a precision computation of hybrid static potentials with quantum numbers Ληε= Σg-,Σu+,Σu-,Πg,Πu,Δg,Δu using SU(3) lattice gauge theory. The resulting potentials are used to…Stefano Capitani, Owe Philipsen, Christian Reisinger et al.·Nov 27, 2018SaveLearn
K π scattering and the K*(892) resonance in 2+1 flavor QCDIn this project, we will compute the form factors relevant for B K*( K π)+- decays. To map the finite-volume matrix elements computed on the lattice to the infinite-volume $B …Gumaro Rendon, Luka Leskovec, Stefan Meinel et al.·Nov 27, 2018SaveLearn
O(4)-symmetric position-space renormalization of lattice operatorsWe extend the position-space renormalization procedure, where renormalization factors are calculated from Green's functions in position space, by introducing a technique to take the average of…Masaaki Tomii, Norman H. Christ·Nov 27, 2018SaveLearn
Simulation of Scalar Field Theories with Complex ActionsMany scalar field theory models with complex actions are invariant under the antilinear (PT) symmetry operation L(-χ)=L(χ). Models in this class include the iϕ3 model, the Bose gas at…Michael C. Ogilvie, Leandro Medina·Nov 27, 2018SaveLearn
Renormalization on the fuzzy sphereWe study renormalization on the fuzzy sphere, which is a typical example of non-commutative spaces. We numerically simulate a scalar field theory on the fuzzy sphere, which is described by a…Kohta Hatakeyama, Asato Tsuchiya, Kazushi Yamashiro·Nov 27, 2018SaveLearn
Non-perturbative generation of elementary fermion masses: a numerical studyIn this talk we present a numerical lattice study of an SU(3) gauge model where an SU(2) doublet of non-Abelian strongly interacting fermions is coupled to a complex scalar field doublet via a Yukawa…Stefano Capitani, Giulia Maria de Divitiis, Petros Dimopoulos et al.·Nov 26, 2018SaveLearn
Towards models with a unified dynamical mechanism for elementary particle massesNumerical evidence for a new dynamical mechanism of elementary particle mass generation has been found by lattice simulation in a simple, yet highly non-trivial SU(3) gauge model where a SU(2)…Roberto Frezzotti, Giancarlo Rossi·Nov 26, 2018SaveLearn
Hypercubic effects in semileptonic decays of heavy mesons, toward B π ν, with Nf=2+1+1 Twisted fermionsWe present a preliminary study toward a lattice determination of the vector and scalar form factors of the B π ν semileptonic decays. We compute the form factors relative to the transition…V. Lubicz, L. Riggio, G. Salerno et al.·Nov 26, 2018SaveLearn
Euclidean partons?In this talk we reexamine the possibility of evaluating parton distribution functions from lattice simulations. We show that, while in principle individual moments can be extracted from lattice data,…Giancarlo Rossi, Massimo Testa·Nov 26, 2018SaveLearn
Simulating quantum field theory with a quantum computerForthcoming exascale digital computers will further advance our knowledge of quantum chromodynamics, but formidable challenges will remain. In particular, Euclidean Monte Carlo methods are not well…John Preskill·Nov 25, 2018SaveLearn
Calculating the ρ radiative decay width with lattice QCDWe present the results of our lattice QCD study of the πγππ process, where the ρ resonance appears as an enhancement in the transition amplitude. We use Nf=2+1 clover fermions on a lattice…Luka Leskovec, Constantia Alexandrou, Stefan Meinel et al.·Nov 25, 2018SaveLearn
Bc spectroscopy using highly improved staggered quarksWe report on a calculation of Bc ground state and radial excitation energies, obtained from heavy-charm highly improved staggered quark (HISQ) correlators computed on MILC gauge ensembles, with…Andrew Lytle, Brian Colquhoun, Christine Davies et al.·Nov 23, 2018SaveLearn
Bag representation for composite degrees of freedom in lattice gauge theories with fermionsWe explore new representations for lattice gauge theories with fermions, where the space-time lattice is divided into dynamically fluctuating regions, inside which different types of degrees of…Carlotta Marchis, Christof Gattringer, Oliver Orasch·Nov 23, 2018SaveLearn
Conformal perturbation description of deconfinementConformal perturbation theory is a powerful tool to describe the behavior of statistical-mechanics models and quantum field theories in the vicinity of a critical point. In the past few years, it has…M. Caselle, N. Magnoli, A. Nada et al.·Nov 22, 2018SaveLearn
Fractional topological charges and the lowest Dirac modesWe introduce vortex configurations with fractional topological charges where one unicolor or colorful intersection of two perpendicular vortex pairs contributes to the topological charge of the…Seyed Mohsen Hosseini Nejad·Nov 22, 2018SaveLearn
String breaking with 2+1 dynamical fermions using the stochastic LapH methodThe static potential V(r) between a static quark and a static antiquark separated by a distance r is defined as the energy of the ground state of the system. As a consequence of confinement, the…Vanessa Koch, John Bulava, Ben Hörz et al.·Nov 22, 2018SaveLearn
The leading hadronic contribution to the running of the Weinberg angle using covariant coordinate-space methodsWe present a preliminary study of the leading hadronic contribution to the running of the Weinberg angle θW. The running is extracted from the correlation function of the…Marco Cè, Antoine Gérardin, Konstantin Ottnad et al.·Nov 21, 2018SaveLearn
Non-perturbative renormalization and O(a)-improvement of the non-singlet vector current with Nf=2+1 Wilson fermions and tree-level Symanzik improved gauge actionIn calculating hadronic contributions to precision observables for tests of the Standard Model in lattice QCD, the electromagnetic current plays a central role. Using a Wilson action with O(a)…Antoine Gerardin, Tim Harris, Harvey B. Meyer·Nov 20, 2018SaveLearn