SU(3) hybrid static potentials at small quark-antiquark separations from fine latticesWe summarize our recent lattice gauge theory computation of the u and u- hybrid static potentials at small quark-antiquark separations. We provide parameterizations of the resulting…Carolin Schlosser, Marc Wagner·Dec 3, 2021SaveLearn
Tensor-network simulation of the strong-coupling U(N) modelWe apply tensor network methods to study the strong-coupling U(N) model in its dimer formulation. In three and four dimensions, we investigate the chiral condensate as a function of the quark mass…Pascal Milde, Jacques Bloch, Robert Lohmayer·Dec 3, 2021SaveLearn
Grid on QPACE 4In 2020 we deployed QPACE 4, which features 64 Fujitsu A64FX model FX700 processors interconnected by InfiniBand EDR. QPACE 4 runs an open-source software stack. For Lattice QCD simulations we ported…Peter Georg, Nils Meyer, Stefan Solbrig et al.·Dec 3, 2021SaveLearn
A new technique for solving the freezing problem in the complex Langevin simulation of 4D SU(2) gauge theory with a theta termWe apply the complex Langevin method (CLM) to overcome the sign problem in 4D SU(2) gauge theory with a theta term extending our previous work on the 2D U(1) case. The topology freezing problem can…Akira Matsumoto, Kohta Hatakeyama, Mitsuaki Hirasawa et al.·Dec 3, 2021SaveLearn
Most charming dibaryon near unitarityWe present a first study on a pair of triply charmed baryons, cccccc in the 1S0 channel, on the basis of the HAL QCD method. The measurements are perfomed on the…Yan Lyu, Hui Tong, Takuya Sugiura et al.·Dec 3, 2021SaveLearn
Bottomonium spectral widths at nonzero temperature using maximum likelihoodWe present progress results from the Fastsum collaboration's programme to determine the spectrum of the bottomonium system as a function of temperature using a variety of approaches. In these…Thomas Spriggs, Gert Aarts, Chris Allton et al.·Dec 2, 2021SaveLearn
LeapfrogLayers: A Trainable Framework for Effective Topological SamplingWe introduce LeapfrogLayers, an invertible neural network architecture that can be trained to efficiently sample the topology of a 2D U(1) lattice gauge theory. We show an improvement in the…Sam Foreman, Xiao-Yong Jin, James C. Osborn·Dec 2, 2021SaveLearn
Tensor-network study of the 3d O(2) model at non-zero chemical potential and temperatureWe present results of tensor-network simulations of the three-dimensional O(2) model at non-zero chemical potential and temperature, which were computed using the higher-order…Jacques Bloch, Robert Lohmayer, Maximilian Meister·Dec 2, 2021SaveLearn
Spectral reconstruction in SU(4) gauge theory with fermions in multiple representationsThe naturalness problem in the Higgs sector finds a popular solution in composite Higgs models. In such theories the Higgs boson emerges as the pseudo-Nambu-Goldstone boson associated with the…Luigi Del Debbio, Alessandro Lupo, Marco Panero et al.·Dec 2, 2021SaveLearn
Gauge-fixed Lattice QCD and the dispersion relation of Wilson fermionsWe show that, when investigating Wilson-fermions correlation functions on the lattice, one is bound to encounter major difficulties in defining their dispersion relation, even at tree level. The…G. Burgio, H. Vogt·Dec 2, 2021SaveLearn
Lattice determination of the pion mass difference Mπ+ - Mπ0 at order O(αem) and O( (md-mu)2) including disconnected diagramsWe present our preliminary results concerning the charged/neutral pion mass difference Mπ+ - Mπ0 at order O(αem) in the QED interactions, and for $Mπ+ -…R. Frezzotti, G. Gagliardi, V. Lubicz et al.·Dec 2, 2021SaveLearn
Magnetic monopole dominance for the Wilson loops in higher representationsThe dual superconductor picture is one of the most promising scenarios for quark confinement. To investigate this picture in a gauge-invariant manner, we have proposed a new formulation of Yang-Mills…Akihiro Shibata, Seikou Kato, Kei-Ichi Kondo·Dec 2, 2021SaveLearn
Equation of State of dense QCD in external magnetic fieldIn this proceeding we present our first results of the study of the QCD Equation of State at non-zero baryon density and in external magnetic field. We focused on the first three non-vanishing…N. Yu. Astrakhantsev, V. V. Braguta, N. V. Kolomoyets et al.·Dec 2, 2021SaveLearn
HAL QCD potentials with non-zero total momentum and an application to the I=2 ππ scatteringWe consider the HAL QCD method in the system with non-zero total momentum (laboratory frame). We derive a relation between the NBS wave function in the laboratory frame and the energy-independent…Sinya Aoki, Yutaro Akahoshi·Dec 2, 2021SaveLearn
Scalar fields on fluctuating hyperbolic geometriesWe present results on the behavior of the boundary-boundary correlation function of scalar fields propagating on discrete two-dimensional random triangulations representing manifolds with the…Muhammad Asaduzzaman, Simon Catterall·Dec 2, 2021SaveLearn
Leading isospin breaking effects in the HVP contribution to aμ and to the running of αThe anomalous magnetic moment of the muon aμ and the running of the electromagnetic coupling α play a fundamental role in beyond Standard Model (SM) physics searches. Non-perturbative…Andreas Risch, Hartmut Wittig·Dec 1, 2021SaveLearn
Chromo-electric screening length in 2+1 flavor QCDWe study Polyakov loop as well as correlators of real and imaginary parts of the Polyakov loop in 2+1 flavor QCD at finite temperature. We use hypercubic (HYP) smearing to improve the signal in the…Peter Petreczky, Sebastian Steinbeißer, Johannes Heinrich Weber·Dec 1, 2021SaveLearn
Charm physics with a tmQCD mixed actionWe report on our ongoing determination of the charm quark mass and the masses and decay constants of various charmed mesons, obtained within a mixed-action setup. We employ Nf=2+1 CLS ensembles…A. Bussone, A. Conigli, J. Frison et al.·Dec 1, 2021SaveLearn
The complex potential from 2+1 flavor QCD using HTL inspired approachWe have studied finite temperature complex static quark-antiquark potentials for 2+1 flavor QCD using highly improved staggered action with physical strange quark masses and light quark masses…Dibyendu Bala, Olaf Kaczmarek, Rasmus Larsen et al.·Dec 1, 2021SaveLearn
Towards the determination of sigma terms for the baryon octet on Nf = 2+1 CLS ensemblesA lot of progress has been made in the determination of nucleon sigma terms. In this work we consider the sigma terms of the other octet baryons as well. These are determined on CLS gauge field…Pia Leonie Jones Petrak, Gunnar Bali, Sara Collins et al.·Dec 1, 2021SaveLearn
Estimating the thermal photon production rate using lattice QCDWe present results for the photon emission rate determined from the transverse channel vector correlator at fixed spatial momentum using two flavors of dynamical Wilson fermions at T250 MeV. We…Csaba Török, Marco Cè, Tim Harris et al.·Dec 1, 2021SaveLearn
Multigrid Solver on FugakuWe report an implementation of a multigrid solver for the Clover fermion on supercomputer Fugaku, which uses A64FX CPU with Arm architecture. On Fugaku, a highly optimized implementation of BiCGStab…Ken-Ichi Ishikawa, Issaku Kanamori, Hideo Matsufuru·Dec 1, 2021SaveLearn
Correlated Dirac Eigenvalues and Axial Anomaly in Chiral Symmetric QCDWe investigate the Dirac eigenvalue spectrum ((λ,ml)) to study the microscopic origin of axial anomaly in high temperature phase of QCD. We propose novel relations between the…Heng-Tong Ding, Sheng-Tai Li, Swagato Mukherjee et al.·Dec 1, 2021SaveLearn
Machine learning Hadron Spectral Functions in Lattice QCDHadron spectral functions carry all the information of hadrons and are encoded in the Euclidean two-point correlation functions. The extraction of hadron spectral functions from the correlator is a…Shi-Yang Chen, Heng-Tong Ding, Fei-Yi Liu et al.·Dec 1, 2021SaveLearn
Deep inelastic scattering off quark-gluon plasma and its photon emissivityThe photon emissivity of quark-gluon plasma probes the interactions in the medium and differs qualitatively between a weakly coupled and a strongly coupled plasma in the soft-photon regime. The…Marco Cè, Tim Harris, Harvey B. Meyer et al.·Dec 1, 2021SaveLearn