Results for αs from the decoupling strategyWe present analysis details and new results for the strong coupling αs(mZ), determined by the decoupling strategy. We measure a massive gradient flow (GF) coupling defined in finite volume…Mattia Dalla Brida, Roman Höllwieser, Francesco Knechtli et al.·Dec 17, 2021SaveLearn
Towards a lattice determination of the form factors of the rare Hyperon decay + p + -The rare Hyperon decay + p + - is an s d flavour changing neutral current, and is therefore suppressed in within the Standard Model, making it an excellent probe for new…Felix Erben, Vera Gülpers, Raoul Hodgson et al.·Dec 17, 2021SaveLearn
Composition of the inclusive semi-leptonic decay of B mesonUtilizing the approach recently proposed for the inclusive semi-leptonic decay rate on the lattice, we compute the differential decay rate of a Bs meson for various kinematical channels. The…Gabriela Bailas, Shoji Hashimoto·Dec 17, 2021SaveLearn
Thermal interquark potentials for bottomonium using NRQCD from the HAL QCD methodWe report our preliminary progress in the calculation of the interquark potential of bottomonium at non-zero temperature using the HAL QCD method. We use NRQCD correlation functions of non-local…Thomas Spriggs, Chris Allton, Timothy Burns et al.·Dec 16, 2021SaveLearn
A variance reduction technique for hadronic correlators with partially twisted boundary conditionsPartially twisted boundary conditions are widely used for improving the momentum resolution in lattice computations of hadronic correlation functions. The method is however expensive since every…Nils Asmussen, Alessandro Barone, Andreas Jüttner·Dec 16, 2021SaveLearn
Hadron spin structure from lattice QCDWe present results on the spin carried by quarks and gluons in the nucleon using lattice QCD simulations with physical values of the light, strange and charm quark masses. We also discuss selective…Constantia Alexandrou·Dec 16, 2021SaveLearn
The QCD Deconfinement Critical Point for Nf=2 Flavors of Staggered FermionsQuenched QCD at zero baryonic chemical potential undergoes a first-order deconfinement phase transition at a critical temperature Tc, which is related to the spontaneous breaking of the global…Reinhold Kaiser, Owe Philipsen, Alessandro Sciarra·Dec 16, 2021SaveLearn
The spectrum of qubitized QCD: glueballs in a S(1080) gauge theoryQuantum simulations of QCD require digitization of the infinite-dimensional gluon field. Schemes for doing this with the minimum amount of qubits are desirable. We present a practical digitization…Andrei Alexandru, Paulo F. Bedaque, Ruairí Brett et al.·Dec 15, 2021SaveLearn
Status on Lattice Calculations of the Proton Spin DecompositionLattice calculations of the proton spin components is reviewed. The lattice results of the quark spin from the axial-vector current matrix element at 0.3- 0.4 is smaller than those from the…Keh-Fei Liu·Dec 15, 2021SaveLearn
Isospin-breaking Effects in Octet and Decuplet Baryon MassesWe present work designed to compute baryon masses on Nf = 2 + 1 CLS ensembles including isospin-breaking effects due to non-degenerate light quark masses and electromagnetic interactions. These…Alexander M. Segner, Andrew D. Hanlon, Renwick J. Hudspith et al.·Dec 15, 2021SaveLearn
Aspects of finite temperature QCD towards the chiral limitQCD under extreme conditions has been studied for a long time, and the chiral limit has been a grey area mostly. In this write-up of my talk, I review some of the recent developments made by the…Anirban Lahiri·Dec 15, 2021SaveLearn
Pseudoscalar transition form factors and the hadronic light-by-light contribution to the muon g-2We present preliminary results from our calculation of the pseudoscalar transition form factors of the η and η' mesons using staggered quarks on Nf=2+1+1 gauge ensembles generated by the…Antoine Gérardin, Jana N. Guenther, Lukas Varnhorst et al.·Dec 15, 2021SaveLearn
Applying machine learning methods to prediction problems of lattice observablesWe discuss the prediction of critical behavior of lattice observables in SU(2) and SU(3) gauge theories. We show that feed-forward neural network, trained on the lattice configurations of gauge…N. V. Gerasimeniuk, M. N. Chernodub, V. A. Goy et al.·Dec 15, 2021SaveLearn
Quantum computing for lattice supersymmetryQuantum computing promises the possibility of studying the real-time dynamics of nonperturbative quantum field theories while avoiding the sign problem that obstructs conventional lattice approaches.…Christopher Culver, David Schaich·Dec 14, 2021SaveLearn
Nucleon Helicity Generalized Parton Distribution at Physical Pion Mass from Lattice QCDThe generalized parton distributions (GPDs) offer a window on three-dimensional imaging of the nucleon, providing understanding of how the fundamental properties of the nucleon, such as its mass and…Huey-Wen Lin·Dec 14, 2021SaveLearn
I=1 π-π scattering at the physical pointWe present a preliminary analysis of I=1 π\,π scattering at the physical point. We make use of the stochastic variant of the distillation framework (also known as sLapH) to compute the…Srijit Paul, Andrew D. Hanlon, Ben Hörz et al.·Dec 14, 2021SaveLearn
Bottomonia screening masses from 2 + 1 flavor QCDThe sequential melting of the bottomonium states is one of the important signals for the existence of a quark gluon plasma. The study of bottomonia spectral functions on the lattice is a difficult…Peter Petreczky, Sayantan Sharma, Johannes Heinrich Weber·Dec 13, 2021SaveLearn
Chiralspin symmetry and confinementInteresting lattice QCD simulations at high temperature in QCD and particular truncated studies have shown the emergence of an unexpected group symmetry, so called chiralspin. However this…Marco Catillo·Dec 13, 2021SaveLearn
Mass estimates of the SU(2) 0++ glueball from spectral methodsThe estimation of the K\"all\'en-Lehmann spectral density from gauge invariant lattice QCD two point correlation functions is proposed, and explored via an inversion strategy based on Tikhonov…David Dudal, Orlando Oliveira, Martin Roelfs·Dec 13, 2021SaveLearn
Nucleon form factors from Nf=2+1+1 twisted mass QCD at the physical pointWe present the nucleon axial and electromagnetic form factors using 211 ensembles of twisted mass fermions with clover improvement and with masses tuned to their physical values. Excited…Constantia Alexandrou, Simone Bacchio, Martha Constantinou et al.·Dec 13, 2021SaveLearn
Scale Setting for CLS 2+1 SimulationsWe present an update of the scale setting for Nf=2+1 flavor QCD using gradient flow scales and pseudo-scalar decay constants. We analyze the latest ensembles with 2+1 flavors of…Ben Straßberger, Marco Cè, Sara Collins et al.·Dec 13, 2021SaveLearn
Computation of QCD meson screening masses at high temperatureWe compute flavor non-singlet meson screening masses in the chiral limit of QCD with Nf=3 quarks. The calculation is carried out at 12 temperatures from T≈ 1 GeV up to the electroweak…Davide Laudicina, Mattia Dalla Brida, Leonardo Giusti et al.·Dec 13, 2021SaveLearn
Deconfinement critical point of heavy quark effective lattice theoriesEffective three-dimensional Polyakov loop theories derived from QCD by strong coupling and hopping expansions are valid for heavy quarks and can also be applied to finite chemical potential μ,…Jangho Kim, Anh Quang Pham, Owe Philipsen·Dec 13, 2021SaveLearn
Symmetry, Confinement, and the Higgs PhaseWe show that the Higgs and confinement phases of a gauge Higgs theory, with the Higgs field in the fundamental representation of the gauge group, are distinguished both by a broken or unbroken…Jeff Greensite, Kazue Matsuyama·Dec 13, 2021SaveLearn
Advances in lattice hadron physics calculations using the gradient flowLattice calculations of hadronic observables are aggravated by short-distance fluctuations. The gradient flow, which can be viewed as a particular realisation of the coarse-graining step of momentum…K. U. Can, R. Horsley, Y. Nakamura et al.·Dec 12, 2021SaveLearn