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High Energy Physics - Lattice papers — page 105

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Lattice simulations of adjoint QCD with one Dirac overlap fermion
In this work we investigate the infrared behaviour of a Yang-Mills theory coupled to a massless fermion in the adjoint representation of the gauge group SU(2). This model has many interesting…
Georg Bergner, Juan Camilo Lopez, Stefano Piemonte et al.May 2, 2022
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Numerical sign problem and the tempered Lefschetz thimble method
The numerical sign problem is a major obstacle to the quantitative understanding of many important physical systems with first-principles calculations. Typical examples for such systems include…
Masafumi Fukuma, Nobuyuki Matsumoto, Yusuke NamekawaMay 2, 2022
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Lattice study of a magnetic contribution to heavy quark momentum diffusion
Heavy quarks placed within a hot QCD medium undergo Brownian motion, characterized by specific transport coefficients. Their determination can be simplified by expanding them in T/M, where T is…
D. Banerjee, S. Datta, M. LaineApr 29, 2022
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The muon anomalous magnetic moment with staggered fermions: is the lattice spacing small enough?
We extend our previous work on the light-quark connected part, aμ HVP,lqc, of the leading order hadronic-vacuum-polarization (HVP) contribution to the muon anomalous magnetic moment…
Christopher Aubin, Thomas Blum, Maarten Golterman et al.Apr 26, 2022
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Restoring rotational invariance for lattice QCD propagators
This note presents a method to reduce the discretization errors appearing when solving a Quantum Field Theory in a hypercubic lattice in both position and momentum-space. The method exploits the…
F. de SotoApr 26, 2022
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Monopoles of the Dirac type and color confinement in QCD -- Gauge invariant mechansim
As a color confinement mechanism, a dual Meissner effect due to Abelian monopoles involved in QCD has been discussed so far in various ways. But still there is an important problem unsolved. It is…
Tsuneo SuzukiApr 25, 2022
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Disconnected contributions to the magnetic polarisability of the neutral pion
The magnetic polarisability of the neutral pion has been calculated using the background field method in lattice QCD. These early results do not consider the effect of the disconnected loop…
Ryan Bignell, Waseem Kamleh, Derek LeinweberApr 20, 2022
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RI/MOM and RI/SMOM renormalization of quark bilinear operators using overlap fermions
We present the vector, scalar and tensor renormalization constants (RCs) using overlap fermions with either regularization independent momentum subtraction (RI/MOM) or symmetric momentum subtraction…
Fangcheng He, Yu-Jiang Bi, Terrence Draper et al.Apr 20, 2022
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The charm-quark contribution to light-by-light scattering in the muon (g-2) from lattice QCD
We compute the hadronic light-by-light scattering contribution to the muon g-2 from the charm quark using lattice QCD. The calculation is performed on ensembles generated with dynamical (u,d,s)…
En-Hung Chao, Renwick J. Hudspith, Antoine Gérardin et al.Apr 19, 2022
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Deconstructing \" Unsal-Yaffe Reconfinement
In the UY reconfined phase on a lattice the thermal trace is over states transforming in all SU(N)/Z(N) irreducible representations as opposed to only over SU(N) singlets in the standard…
Herbert NeubergerApr 18, 2022
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One-Loop Hybrid Renormalization Matching Kernels for Quasi-Parton Distributions
Large momentum effective theory allows extraction of hadron parton distribution functions in lattice QCD by matching them to quark bilinear matrix elements of hadrons with large momenta. We calculate…
Chien-Yu Chou, Jiunn-Wei ChenApr 18, 2022
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Impact of centre vortex removal on the Landau-gauge quark propagator in dynamical QCD
The important role of centre vortices in dynamical chiral symmetry breaking and corresponding dynamical mass generation has been demonstrated in pure gauge studies of the Landau-gauge quark…
Adam Virgili, Waseem Kamleh, Derek LeinweberApr 14, 2022
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Improved data analysis on two-point correlation function with sequential Bayesian method
We report our progress in data analysis on two-point correlation functions of the B meson using sequential Bayesian method. The data set of measurement is obtained using the Oktay-Kronfeld (OK)…
Tanmoy Bhattacharya, Benjamin J. Choi, Rajan Gupta et al.Apr 12, 2022
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Centre Vortices in the Presence of Dynamical Fermions
The behaviour of centre vortices in the presence of dynamical fermions is studied for the first time in the context of the static quark potential and the Landau-gauge gluon propagator. These results…
James Biddle, Waseem Kamleh, Derek LeinweberApr 12, 2022
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Impact of Dynamical Fermions on Centre Vortex Structure
This presentation examines the centre vortex structure of Monte-Carlo generated gauge-field configurations using modern visualisation techniques. This time, the manner in which light dynamical…
Derek Leinweber, James Biddle, Waseem KamlehApr 11, 2022
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Spurious poles in a finite volume
Using effective-range expansion for the two-body amplitudes may generate spurious sub-threshold poles outside of the convergence range of the expansion. In the infinite volume, the emergence of such…
Jin-Yi Pang, Martin Ebert, Hans-Werner Hammer et al.Apr 11, 2022
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Emergent strongly coupled ultraviolet fixed point in four dimensions with 8 K\"ahler-Dirac fermions
The existence of a strongly coupled ultraviolet fixed point in 4-dimensional lattice models as they cross into the conformal window has long been hypothesized. The SU(3) gauge system with 8…
Anna HasenfratzApr 11, 2022
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Emergent phenomena from centre vortices
Quark confinement is perhaps the most important emergent property of the theory of quantum chromodynamics. Herein we review some key aspects of centre vortices in SU(3) lattice gauge theory. Starting…
Waseem Kamleh, James Biddle, Derek B. Leinweber et al.Apr 8, 2022
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Canonical partition function and center symmetry breaking in finite density lattice gauge theories
We study the nature of the phase transition of lattice gauge theories at high temperature and high density by focusing on the probability distribution function, which represents the probability that…
Shinji EjiriApr 7, 2022
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Vector boson scattering from the lattice
We study vector-boson scattering of the physical, gauge-invariant states in a reduced standard-model setup on the lattice for various parameter sets. To this end, the phase shift in the scalar…
Patrick Jenny, Axel Maas, Bernd RiedererApr 6, 2022
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Properties of low-lying charmonia and bottomonia from lattice QCD + QED
The precision of lattice QCD calculations has been steadily improving for some time and is now approaching, or has surpassed, the 1% level for multiple quantities. At this level QED effects, i.e. the…
J. Koponen, B. Galloway, D. Hatton et al.Apr 5, 2022
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Extensively parallelizable chiral fermion
Chiral symmetry is a key to investigating quantum physics, from condensed matter to particle physics. We propose a novel way of realizing a chiral fermion, known as the overlap-Dirac operator,…
Yuki Nagai, Akio TomiyaApr 4, 2022
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Topological susceptibility in finite temperature QCD with physical (u/d, s, c) domain-wall quarks
We perform hybrid Monte-Carlo (HMC) simulation of lattice QCD with Nf=2+1+1 domain-wall quarks at the physical point, on the 643 × (64,20,16,12,10,8,6) lattices, each with three lattice…
Yu-Chih Chen, Ting-Wai Chiu, Tung-Han HsiehApr 4, 2022
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Muon g-2 with overlap valence fermions
We present a lattice calculation of the leading order (LO) hadronic vacuum polarization (HVP) contribution to the muon anomalous magnetic moment for the connected light and strange quarks, $a…
Gen Wang, Terrence Draper, Keh-Fei Liu et al.Apr 4, 2022
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Neutral meson mixing in the B0(s) sector from lattice QCD
We summarise the current status of lattice QCD computations of neutral meson parameters in the Bd0 and the Bs0 systems. We comment on recent results and anticipate further improvements on the…
Justus Tobias TsangApr 4, 2022
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