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High Energy Physics - Lattice papers — page 189

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From chiral symmetry breaking to conformality in SU(2) gauge theory
We compute the spectrum of SU(2) gauge theory with two, four or six Dirac fermions in the fundamental representation of the gauge group. We investigate the scaling of the meson masses as a function…
Alessandro Amato, Viljami Leino, Kari Rummukainen et al.Jun 19, 2018
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AVX-512 extension to OpenQCD 1.6
We publish an extension of openQCD-1.6 with AVX-512 vector instructions using Intel intrinsics. Recent Intel processors support extended instruction sets with operations on 512-bit wide vectors,…
Ed Bennett, Mark Dawson, Michele Mesiti et al.Jun 15, 2018
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Localization of topological charge density near Tc in quenched QCD with Wilson flow
We smear quenched lattice QCD ensembles with lattice volume 323× 8 by using Wilson flow. Six ensembles at temperature near the critical temperature Tc corresponding to the critical inverse…
You-Hao Zou, Jian-Bo Zhang, Guang-Yi XiongJun 13, 2018
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Gluon propagator on a centre-vortex background
The impact of SU(3) centre vortices on the gluon propagator in Landau gauge is investigated on original, vortex-removed and vortex-only lattice gauge field configurations. Vortex identification is…
James C. Biddle, Waseem Kamleh, Derek B. LeinweberJun 12, 2018
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Single flavour optimisations to Hybrid Monte Carlo
It has become increasingly important to include one or more individual flavours of dynamical fermion in lattice QCD simulations. This is due in part to the advent of QCD+QED calculations, where…
Taylor Haar, Waseem Kamleh, James Zanotti et al.Jun 12, 2018
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Precise predictions of charmed-bottom hadrons from lattice QCD
We report the ground state masses of hadrons containing at least one charm and one bottom quark using lattice quantum chromodynamics. These include mesons with spin (J)-parity (P) quantum numbers…
Nilmani Mathur, M. Padmanath, Sourav MondalJun 11, 2018
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Charmonium resonances on the lattice
The nature of resonances and excited states near decay thresholds is encoded in scattering amplitudes, which can be extracted from single-particle and multiparticle correlators in finite volumes.…
G. S. Bali, S. Collins, D. Mohler et al.Jun 7, 2018
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Comment on Implications of new physics in the decays Bc (J/ψ,ηc)τν
As part of a study BSM corrections to leptonic decays of the Bc meson, Tran et al. (arXiv:1801.06927) use the covariant confining quark model (CCQM) to estimate the matrix element of the…
Christine Davies, Craig McNeileJun 7, 2018
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Two- and three-body interactions in φ4 theory from lattice simulations
We calculate the one-, two- and three-particle energy levels for different lattice volumes in the complex φ4 theory on the lattice. We argue that the exponentially suppressed finite-volume…
Fernando Romero-López, Akaki Rusetsky, Carsten UrbachJun 6, 2018
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A lattice QCD study of pion-nucleon scattering in the Roper channel
We present a lattice QCD study of the puzzling positive-parity nucleon channel, where the Roper resonance N*(1440) resides in experiment. The study is based on an ensemble of gauge configurations…
Luka Leskovec, Christian B. Lang, M. Padmanath et al.Jun 6, 2018
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Infinite lattice models by expansion with a non-Gaussian initial approximation
Recently, a convergent series employing a non-Gaussian initial approximation was constructed and shown to be an effective computational tool for the finite size lattice models with a polynomial…
Aleksandr Ivanov, Vasily SazonovJun 5, 2018
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Phase Unwrapping and One-Dimensional Sign Problems
Sign problems in path integrals arise when different field configurations contribute with different signs or phases. Phase unwrapping describes a family of signal processing techniques in which phase…
William Detmold, Gurtej Kanwar, Michael L. WagmanJun 5, 2018
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The two-dimensional twisted reduced principal chiral model revisited
Motivated by our previous study of the Twisted Eguchi-Kawai model for non minimal twists, we re-examined the behaviour of the reduced version of the two dimensional principal chiral model. We show…
Antonio Gonzalez-Arroyo, Masanori OkawaJun 5, 2018
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Nonperturbative Renormalization of Operators in Near-Conformal Systems Using Gradient Flows
We propose a continuous real space renormalization group transformation based on gradient flow, allowing for a numerical study of renormalization without the need for costly ensemble matching. We…
Andrea Carosso, Anna Hasenfratz, Ethan T. NeilJun 4, 2018
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χtop(T Tc) in pure-glue QCD through reweighting
We calculate the topological susceptibility at 2.5 Tc and 4.1 Tc in SU(3) pure Yang-Mills theory. We define topology with the help of gradient flow and we largely overcome the problem of poor…
P. Thomas Jahn, Guy D. Moore, Daniel RobainaJun 4, 2018
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Euclidean versus Minkowski short distance
In this note we reexamine the possibility of extracting parton distribution functions from lattice simulations. We discuss the case of quasi-parton distribution functions, the possibility of using…
Giancarlo Rossi, Massimo TestaJun 3, 2018
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A percent-level determination of the nucleon axial coupling from Quantum Chromodynamics
The axial coupling of the nucleon, gA, is the strength of its coupling to the weak axial current of the Standard Model of particle physics, in much the same way as the…
Chia Cheng Chang, Amy Nicholson, Enrico Rinaldi et al.May 30, 2018
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Casimir effect in Yang-Mills theory
We study, for the first time, the Casimir effect in non-Abelian gauge theory using first-principle numerical simulations. Working in two spatial dimensions at zero temperature we find that closely…
M. N. Chernodub, V. A. Goy, A. V. Molochkov et al.May 30, 2018
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Estimating χtop Lattice Artifacts from Flowed SU(2) Calorons
Lattice computations of the high-temperature topological susceptibility of QCD receive lattice-spacing corrections and suffer from systematics arising from the type and depth of gradient flow. We…
Peter Thomas Jahn, Guy D. Moore, Daniel RobainaMay 29, 2018
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Image-processing the topological charge density in the CP(N-1) model
We study the topological charge density distribution using the two-dimensional CPN-1 model. We numerically compute not only the topological susceptibility, which is a spatially global quantity…
Yuya Abe, Kenji Fukushima, Yoshimasa Hidaka et al.May 28, 2018
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Weak decay of magnetized pions
The leptonic decay of charged pions is investigated in the presence of background magnetic fields. In this situation Lorentz symmetry is broken and new fundamental decay constants need to be…
Gunnar S. Bali, Bastian B. Brandt, Gergely Endrodi et al.May 28, 2018
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Utility of geometry in lattice QCD simulations
We propose a way to improve the resolution of the spatial momentum and the time interval for hadron propagators utilizing the lattice geometry. We demonstrate the validity of the method presenting…
Naoya Ukita, Ken-Ichi Ishikawa, Yoshinobu KuramashiMay 28, 2018
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Numerical study of the N=2 Landau--Ginzburg model
It is believed that the two-dimensional massless N=2 Wess--Zumino model becomes the N=2 superconformal field theory (SCFT) in the infrared (IR) limit. We examine this…
Okuto Morikawa, Hiroshi SuzukiMay 28, 2018
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Large N scaling and factorization in SU(N) Yang-Mills gauge theory
The large N limit of SU(N) gauge theories is well understood in perturbation theory. Also non-perturbative lattice studies have yielded important positive evidence that 't Hooft's…
Miguel García Vera, Rainer SommerMay 28, 2018
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Nucleon charges with dynamical overlap fermions
We calculate the scalar and tensor charges of the nucleon in 2+1-flavor lattice QCD, for which the systematics of the renormalization of the disconnected diagram is well controlled. Numerical…
Nodoka Yamanaka, Shoji Hashimoto, Takashi Kaneko et al.May 26, 2018
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