Exclusive Channel Study of the Muon HVPThe Hadronic Vacuum Polarization (HVP) is a dominant contribution to the theoretical uncertainty of the muon anomalous magnetic moment. The uncertainty in a lattice QCD calculation of the connected…Mattia Bruno, Taku Izubuchi, Christoph Lehner et al.·Oct 25, 2019SaveLearn
Ground state mass in short lattices by controlling overconfidence and bias in Bayesian fitsWe investigate the seemingly ill-defined problem of extracting a ground-state mass from a lattice simulation where the extent of the lattice is not long enough to project out the ground-state…Sourendu Gupta, Anirban Lahiri·Oct 24, 2019SaveLearn
Applying Complex Langevin to Lattice QCD at finite μWe continue our simulations of lattice QCD at finite quark-number chemical potential, μ, using the complex-Langevin equation (CLE) with gauge-cooling and adaptive updating. The CLE is used because…D. K. Sinclair, J. B. Kogut·Oct 24, 2019SaveLearn
Details of a staggered fermion data analysisWe present technical details of an analysis of pseudo-scalar data from a QCD simulation with staggered fermions. The data were obtained close to the physical point with an inverse lattice spacing of…Maximilian Ammer, Stephan Durr·Oct 24, 2019SaveLearn
Free energy of the self-interacting relativistic lattice Bose gas at finite densityThe density of state approach has recently been proposed as a potential route to circumvent the sign problem in systems at finite density. In this study, using the Linear Logarithmic Relaxation (LLR)…Olmo Francesconi, Markus Holzmann, Biagio Lucini et al.·Oct 24, 2019SaveLearn
Lattice QCD study of the rare kaon decay K+π+νν at a near-physical pion massThe rare kaon decay K+π+νν is an ideal process in which to search for signs of new physics and is the primary goal of the NA62 experiment at CERN. In this paper we report on a lattice QCD…Norman H. Christ, Xu Feng, Antonin Portelli et al.·Oct 23, 2019SaveLearn
Meson interactions at large Nc from Lattice QCDWe report on the computation of the scaling of QCD observables with the number of colours, Nc. For this, we use dynamical configurations with four active flavours, Nf=4, and values of…Fernando Romero-López, Andrea Donini, Pilar Hernández et al.·Oct 23, 2019SaveLearn
Fits of SU(3) Nf=8 data to dilaton-pion effective field theoryWe report on fits of the SU(3) Nf=8 LSD spectral data to chiral perturbation theory with a dilatonic meson. These fits confirm that current simulations are in the "large-mass" regime,…Maarten Golterman, Yigal Shamir·Oct 23, 2019SaveLearn
Color halo scenario of charmonium-like hybridsThe internal structures of JPC=1--, (0,1,2)-+ charmonium-like hybrids are investigated under lattice QCD in the quenched approximation. We define the Bethe-Salpeter wave function…Yunheng Ma, Wei Sun, Ying Chen et al.·Oct 22, 2019SaveLearn
Atiyah-Patodi-Singer index on a latticeWe propose a non-perturbative formulation of the Atiyah-Patodi-Singer(APS) index in lattice gauge theory, in which the index is given by the η invariant of the domain-wall Dirac operator. Our…Hidenori Fukaya, Naoki Kawai, Yoshiyuki Matsuki et al.·Oct 21, 2019SaveLearn
Lattice gauge theory for Haldane conjecture and central-branch Wilson fermionWe develop the (1+1)d lattice U(1) gauge theory in order to define 2-flavor massless Schwinger model, and discuss its connection with Haldane conjecture. We propose to use the central-branch…Tatsuhiro Misumi, Yuya Tanizaki·Oct 21, 2019SaveLearn
Exact β-function of Yang-Mills theory in 2+1 dimensionsTo set the stage, I discuss the β-function of the massless O(N) model in three dimensions, which can be calculated exactly in the large N limit. Then, I consider SU(N) Yang-Mills theory in 2+1…Paul Romatschke·Oct 21, 2019SaveLearn
The hadronic contribution to the running of the electromagnetic coupling and the electroweak mixing angleThe electromagnetic coupling α and the electroweak mixing angle θW are parameters of the Standard Model (SM) that enter precision SM tests and play a fundamental rôle in beyond SM…Marco Cè, Teseo San José, Antoine Gérardin et al.·Oct 21, 2019SaveLearn
Benchmarking quantum computers for real-time evolution of a (1+1) field theory with error mitigationQuantum computers open the possibility of performing real-time calculations for quantum field theory scattering processes. We propose to use an index averaging the absolute value of the difference…Erik Gustafson, Patrick Dreher, Zheyue Hang et al.·Oct 21, 2019SaveLearn
Controlling Complex Langevin simulations of lattice models by boundary term analysisOne reason for the well known fact that the Complex Langevin (CL) method sometimes fails to converge or converges to the wrong limit has been identified long ago: it is insufficient decay of the…M. Scherzer, E. Seiler, D. Sexty et al.·Oct 21, 2019SaveLearn
Baryon bag simulation of QCD in the strong coupling limitWe explore the possibility of a simulation of strong coupling QCD in terms of so-called baryon bags. In this form the known representation in terms of monomers, dimers and baryon loops is reorganized…Oliver Orasch, Shailesh Chandrasekharan, Christof Gattringer et al.·Oct 21, 2019SaveLearn
How to extract the "Abelian" part of double-winding Wilson loopIt is known that the naive Abelian Wilson loop defined by the Abelian projection cannot reproduce the correct behavior of the double-winding Wilson loop. It is also known that the naive Abelian…Ryutaro Matsudo·Oct 20, 2019SaveLearn
A lattice model of heavy-light three-body systemWe present a study of a 1+1 dimensional heavy-light three-body system in finite volume. The heavy-light system is simulated by a coupled-channel ϕ4 type lattice model, and both ground state and…Peng Guo, Michael Döring·Oct 18, 2019SaveLearn
Lattice study of electromagnetic conductivity of quark-gluon plasma in external magnetic fieldWe study the electromagnetic (e.m.) conductivity of QGP in a magnetic background by lattice simulations with Nf = 2+1 dynamical rooted staggered fermions at the physical point. We study the…Nikita Yu. Astrakhantsev, Victor V. Braguta, Massimo D'Elia et al.·Oct 18, 2019SaveLearn
Two-colour QCD phases and the topology at low temperature and high densityWe delineate equilibrium phase structure and topological charge distribution of dense two-colour QCD at low temperature by using a lattice simulation with two-flavour Wilson fermions that has a…Kei Iida, Etsuko Itou, Tong-Gyu Lee·Oct 17, 2019SaveLearn
Glueball scattering cross section in lattice SU(2) Yang-Mills theoryWe calculate the scattering cross section between two 0++ glueballs in SU(2) Yang-Mills theory on lattice at β = 2.1, 2.2, 2.3, 2.4, and 2.5 using the indirect (HAL QCD) method. We…Nodoka Yamanaka, Hideaki Iida, Atsushi Nakamura et al.·Oct 17, 2019SaveLearn
Excited bottomonia in quark-gluon plasma from lattice QCDWe present the first lattice QCD study of up to 3S and 2P bottomonia at non-zero temperatures. Correlation functions of bottomonia were computed using novel bottomonium operators and a…Rasmus Larsen, Stefan Meinel, Swagato Mukherjee et al.·Oct 16, 2019SaveLearn
Radiative corrections to semileptonic decay ratesWe discuss the theoretical framework required for the computation of radiative corrections to semileptonic decay rates in lattice simulations, and in particular to those for K3 decays. This…C. T. Sachrajda, M. Di Carlo, G. Martinelli et al.·Oct 16, 2019SaveLearn
Exploring the tension between nature and the Standard Model: the muon g-2Anomalous magnetic moment of the muon (muon g-2) is one of the most precisely measured quantities in particle physics. At the same time, it can be evaluated in the Standard Model with an…Marina Krstic Marinkovic, Nuno Cardoso·Oct 15, 2019SaveLearn
Non-perturbative renormalization of O(a) improved tensor currentsWe present our progress in the non-perturbative O(a) improvement and renormalization of tensor currents in three-flavor lattice QCD with Wilson-clover fermions and tree-level Symanzik improved gauge…Leonardo Chimirri, Patrick Fritzsch, Jochen Heitger et al.·Oct 15, 2019SaveLearn