Examples of symmetry-preserving truncations in tensor field theoryWe consider the tensor formulation of the non-linear O(2) sigma model and its gauged version (the compact Abelian Higgs model), on a D-dimensional cubic lattice, and show that tensorial truncations…Yannick Meurice·Mar 5, 2019SaveLearn
Semi-leptonic form factors for Bs K ν and Bs Ds νSemi-leptonic Bs K ν and Bs Ds ν decays provide an alternative b-decay channel to determine the CKM matrix elements |Vub| and |Vcb| or to obtain R-ratios to…Jonathan M. Flynn, Ryan C. Hill, Andreas Jüttner et al.·Mar 5, 2019SaveLearn
Radiative contribution to the composite-Higgs potential in a two-representation lattice modelWorking in a two-representation lattice gauge theory that is close to a composite Higgs model, we calculate the low-energy constant CLR which controls the contribution of the electroweak gauge bosons…Venkitesh Ayyar, Maarten Golterman, Daniel C. Hackett et al.·Mar 4, 2019SaveLearn
Application of the path optimization method to the sign problem in an effective model of QCD with a repulsive vector-type interactionThe path optimization method is applied to a QCD effective model with the Polyakov loop and the repulsive vector-type interaction at finite temperature and density to circumvent the model sign…Kouji Kashiwa, Yuto Mori, Akira Ohnishi·Mar 2, 2019SaveLearn
Matching of Nf=2+1 CLS ensembles to a tmQCD valence sectorA mixed action composed of valence quark flavours regularized with a fully-twisted tmQCD action and of Nf=2+1 flavours of non-perturbatively O(a)-improved Wilson sea quarks is described.…Andrea Bussone, Gregorio Herdoíza, Carlos Pena et al.·Mar 1, 2019SaveLearn
Finite Temperature Landau Gauge Lattice Quark PropagatorThe quark propagator at finite temperature is investigated using quenched gauge configurations. The propagator form factors are investigated for temperatures above and below the gluon deconfinement…Orlando Oliveira, Paulo J. Silva·Mar 1, 2019SaveLearn
Numerical results for the lightest bound states in N=1 supersymmetric SU(3) Yang-Mills theoryThe physical particles in supersymmetric Yang-Mills theory (SYM) are bound states of gluons and gluinos. We have determined the masses of the lightest bound states in SU(3) N=1 SYM. Our…Sajid Ali, Georg Bergner, Henning Gerber et al.·Feb 28, 2019SaveLearn
Inhomogeneous phases in the 1+1 dimensional Gross-Neveu model at finite number of fermion flavorsWe study the phase diagram of the 1+1 dimensional Gross-Neveu model at finite number of fermion flavors using lattice field theory. Numerical results are presented, which indicate the existence of an…Laurin Pannullo, Julian Lenz, Marc Wagner et al.·Feb 28, 2019SaveLearn
Prony methods for extracting excited statesWe propose an algebraic method for extracting excited states from lattice gauge theory correlation functions. Instead of fitting to a sum of decaying exponentials, we adopt a variant of Prony's…Kimmy K. Cushman, George T. Fleming·Feb 27, 2019SaveLearn
The quenched SU(2) scalar-gluon vertex in minimal Landau gaugeThe question of whether confining effects are visible in correlation functions is a long-standing one. Complementing investigations on the propagators of fundamental and adjoint scalar matter…Axel Maas·Feb 27, 2019SaveLearn
Constraints on Disconnected Contributions in ππ ScatteringThe accuracy of the lattice QCD computation of hadron-hadron scattering at low isospin depends critically on the ability to compute correlation functions with fermionic disconnected Wick…N. Ripunjay Acharya, Feng-Kun Guo, Ulf-G. Meißner et al.·Feb 27, 2019SaveLearn
Numerical stochastic perturbation theory applied to the twisted Eguchi-Kawai modelWe present the results of an exploratory study of the numerical stochastic perturbation theory (NSPT) applied to the four dimensional twisted Eguchi-Kawai (TEK) model. We employ a Kramers type…Antonio González-Arroyo, Issaku Kanamori, Ken-Ichi Ishikawa et al.·Feb 26, 2019SaveLearn
Lattice study of QCD at finite chiral density: topology and confinementIn this paper we study the properties of QCD at nonzero chiral density ρ5, which is introduced through chiral chemical potential μ5. The study is performed within lattice simulation of QCD with…N. Yu. Astrakhantsev, V. V. Braguta, A. Yu. Kotov et al.·Feb 25, 2019SaveLearn
Real-time quantum dynamics, path integrals and the method of thimblesDirect numerical evaluation of the real-time path integral has a well-known sign problem that makes convergence exponentially slow. One promising remedy is to use Picard-Lefschetz theory to flow the…Zong-Gang Mou, Paul M. Saffin, Anders Tranberg et al.·Feb 25, 2019SaveLearn
Conformal dimensions in the large charge sectors at the O(4) Wilson-Fisher fixed pointWe study the O(4) Wilson-Fisher fixed point in 2+1 dimensions in fixed large-charge sectors identified by products of two spin-j representations (jL, jR). Using effective field theory we derive a…Debasish Banerjee, Shailesh Chandrasekharan, Domenico Orlando et al.·Feb 25, 2019SaveLearn
Progress in Multibaryon SpectroscopyAnchoring the nuclear interaction in QCD is a long-outstanding problem in nuclear physics. While the lattice community has made enormous progress in mesonic physics and single nucleon physics,…Evan Berkowitz, David Brantley, Kenneth McElvain et al.·Feb 25, 2019SaveLearn
Hints and challenges in heavy flavor physicsHeavy flavor physics entered a new era when the Belle II experiment observed its first collision. There are several hints found so far by BaBar, Belle, and LHCb in particular, that suggest the…Shoji Hashimoto·Feb 25, 2019SaveLearn
A study of center and chiral symmetry realization in thermal N=1 super Yang-Mills theory using the gradient flowThe realization of center and chiral symmetries in N=1 super Yang-Mills theory (SYM) is investigated on a four-dimensional Euclidean lattice by means of Monte Carlo methods. At zero…Georg Bergner, Camilo López, Stefano Piemonte·Feb 22, 2019SaveLearn
FLAG Review 2019We review lattice results related to pion, kaon, D-meson, B-meson, and nucleon physics with the aim of making them easily accessible to the nuclear and particle physics communities. More…S. Aoki, Y. Aoki, D. Becirevic et al.·Feb 20, 2019SaveLearn
Charmonium and exotics from lattice QCDWe review selected lattice results on the charmonium spectrum and first attempts to search for the existence of exotic states. The hadro-quarkonium model was proposed to interpret some of the exotic…Francesco Knechtli·Feb 19, 2019SaveLearn
Hadronic-vacuum-polarization contribution to the muon's anomalous magnetic moment from four-flavor lattice QCDWe calculate the contribution to the muon anomalous magnetic moment hadronic vacuum polarization from the connected diagrams of up and down quarks, omitting electromagnetism. We employ QCD…C. T. H. Davies, C. DeTar, A. X. El-Khadra et al.·Feb 12, 2019SaveLearn
Light Nuclei from Lattice QCD: Spectrum, Structure and ReactionsLattice Quantum Chromodynamics (LQCD) studies of light nuclei have entered an era when first results on structure and reaction properties of light nuclei have emerged in recent years, complementing…Zohreh Davoudi·Feb 12, 2019SaveLearn
String breaking by light and strange quarks in QCDThe energy spectrum of a system containing a static quark anti-quark pair is computed for a wide range of source separations using lattice QCD with Nf=2+1 dynamical flavours. By employing…John Bulava, Ben Hörz, Francesco Knechtli et al.·Feb 11, 2019SaveLearn
Meson Electromagnetic Form Factors from Lattice QCDLattice QCD can provide a direct determination of meson electromagnetic form factors, making predictions for upcoming experiments at Jefferson Lab. The form factors are a reflection of the…C. T. H. Davies, J. Koponen, G. P. Lepage et al.·Feb 11, 2019SaveLearn
Confirming the Existence of the strong CP Problem in Lattice QCD with the Gradient FlowWe calculate the electric dipole moment of the nucleon induced by the QCD theta term. We use the gradient flow to define the topological charge and use Nf = 2+1 flavors of dynamical quarks…Jack Dragos, Thomas Luu, Andrea Shindler et al.·Feb 8, 2019SaveLearn