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High Energy Physics - Lattice papers — page 143

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Perturbative Removal of a Sign Problem
This paper presents a method for alleviating sign problems in lattice path integrals, including those associated with finite fermion density in relativistic systems. The method makes use of…
Scott LawrenceSep 23, 2020
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Distillation at High-Momentum
Extraction of hadronic observables at finite-momenta from Lattice QCD (LQCD) is constrained by the well-known signal-to-noise problems afflicting all such LQCD calculations. Traditional quark…
Colin Egerer, Robert G. Edwards, Kostas Orginos et al.Sep 22, 2020
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Investigation of Doubly Heavy Tetraquark Systems using Lattice QCD
We search for possibly existent bound states in the heavy-light tetraquark channels with quark content bbud , bbus and bcud using lattice QCD. We carry…
Martin Pflaumer, Luka Leskovec, Stefan Meinel et al.Sep 22, 2020
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Decays of an exotic 1-+ hybrid meson resonance in QCD
We present the first determination of the hadronic decays of the lightest exotic JPC=1-+ resonance in lattice QCD. Working with SU(3) flavor symmetry, where the up, down and strange quark…
Antoni J. Woss, Jozef J. Dudek, Robert G. Edwards et al.Sep 21, 2020
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The quenched Eguchi-Kawai model revisited
The motivation and construction of the original Quenched Eguchi-Kawai model are reviewed, providing much greater detail than in the first, 1982 QEK paper. A 2008 article announced that QEK fails as a…
Herbert NeubergerSep 20, 2020
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A Preliminary Determination of the Second Mellin Moment of the Pion's Distribution Amplitude Using the Heavy Quark Operator Product Expansion
We explore the feasibility of determining Mellin moments of the pion's light cone distribution amplitude using the heavy quark operator product expansion (HOPE) method. As the first step of a proof…
William Detmold, Anthony V. Grebe, Issaku Kanamori et al.Sep 20, 2020
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b *(1520)+- form factors from lattice QCD
We present the first lattice QCD determination of the b *(1520) vector, axial vector, and tensor form factors that are relevant for the rare decays $b …
Stefan Meinel, Gumaro RendonSep 19, 2020
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Complex Langevin studies of the dynamical compactification of extra dimensions in the Euclidean IKKT matrix model
The type IIB matrix model, also known as the IKKT matrix model, is a promising candidate for a nonperturbative formulation of superstring theory. In this talk we study the Euclidean version of the…
Konstantinos N. Anagnostopoulos, Takehiro Azuma, Yuta Ito et al.Sep 18, 2020
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Finite-volume effects in long-distance processes with massless leptonic propagators
In Ref. [1], a method was proposed to calculate QED corrections to hadronic self energies from lattice QCD without power-law finite-volume errors. In this paper, we extend the method to processes…
Norman H. Christ, Xu Feng, Lu-Chang Jin et al.Sep 17, 2020
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QED interaction effects on heavy meson masses from lattice QCD+QED
Hadron masses are subject to few MeV corrections arising from QED interactions, almost entirely arising from the electric charge of the valence quarks. The QED effects include both self-energy…
D. Hatton, C. T. H. Davies, G. P. LepageSep 16, 2020
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Lattice N=4 super Yang-Mills at Strong Coupling
In this paper we present results from numerical simulations of N=4 super Yang-Mills for two color gauge theory over a wide range of 't Hooft coupling 0<λ 30 using a supersymmetric lattice…
Simon Catterall, Joel Giedt, Goksu can TogaSep 15, 2020
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The nonperturbative contribution to asymptotic masses
In gauge theories, charged particles obey modified dispersion due to medium interactions (forward scattering), leading at high energies E ≥ T to an asymptotic mass-squared m2∞. We…
Guy D. Moore, Niels SchlusserSep 14, 2020
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Resolving the scales of the Yang-Mills theory by means of an extra dimension
The Yang-Mills theory is part of the Standard Model of particle physics. The lack of the mathematical understanding of the theory stands out in theoretical physics. In order to address this problem…
Artan BoriçiSep 14, 2020
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Lattice QCD constraints on the parton distribution functions of 3He
The fraction of the longitudinal momentum of 3He that is carried by the isovector combination of u and d quarks is determined using lattice QCD for the first time. The ratio of this…
William Detmold, Marc Illa, David J. Murphy et al.Sep 11, 2020
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Pad\'e Approximants and the analytic structure of the gluon and ghost propagators
In a Quantum Field Theory, the analytic structure of the 2-points correlation functions, ie the propagators, encloses information about the properties of the corresponding quanta, particularly if…
Alexandre F. FalcãoSep 11, 2020
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The energy-dependent π+ π+ π+ scattering amplitude from QCD
Focusing on three-pion states with maximal isospin (π+π+π+), we present the first non-perturbative determination of an energy-dependent three-hadron scattering amplitude from…
Maxwell T. Hansen, Raul A. Briceño, Robert G. Edwards et al.Sep 10, 2020
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Critical Behaviour in the Single Flavor Thirring Model in 2+1d
Results of a lattice field theory simulation of the single-flavor Thirring model in 2+1 spacetime dimensions are presented. The lattice model is formulated using domain wall fermions as a means to…
Simon Hands, Michele Mesiti, Jude WorthySep 7, 2020
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QED3-inspired three-dimensional conformal lattice gauge theory without fine-tuning
We construct a conformal lattice theory with only gauge degrees of freedom based on the induced non-local gauge action in QED3 coupled to large number of flavors N of massless two-component…
Nikhil Karthik, Rajamani NarayananSep 2, 2020
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Field sparsening for the construction of the correlation functions in lattice QCD
Two field-sparsening methods, namely the sparse-grid method and the random field selection method, are used in this paper for the construction of the 2-point and 3-point correlation functions in…
Yuan Li, Shi-Cheng Xia, Xu Feng et al.Sep 2, 2020
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Interaction potential between heavy Q Q in color octet configuration in QGP
We investigate the interaction between a heavy quark-antiquark pair in color octet configuration in gluon plasma. We calculate nonperturbatively an effective thermal potential for such a pair through…
Dibyendu Bala, Saumen DattaSep 2, 2020
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New method for calculating electromagnetic effects in semileptonic beta-decays of mesons
We construct several classes of hadronic matrix elements and relate them to the low-energy constants in Chiral Perturbation Theory that describe the electromagnetic effects in the semileptonic beta…
Chien-Yeah Seng, Xu Feng, Mikhail Gorchtein et al.Sep 1, 2020
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Setting the scale for nHYP fermions with the L\"uscher-Weisz gauge action
Lattice QCD calculations using gauge smearing for fermion kernels are computationally efficient. Hypercubic blocking (nHYP smearing) has been shown to reduce scaling errors. In this work we use an…
Hossein Niyazi, Andrei Alexandru, Frank X. Lee et al.Aug 29, 2020
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DDK system in finite volume
The DDK 3-body system is supposed to be bound due to the strongly attractive interaction between the D meson and the K meson in the isospin zero channel. The minimum quark content of this…
Jin-Yi Pang, Jia-Jun Wu, Li-Sheng GengAug 29, 2020
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PDFs and Neutrino-Nucleon Scattering from Hadronic Tensor
We review the Euclidean path-integral formulation of the nucleon hadronic tensor and classify the gauge invariant and topologically distinct insertions in terms of connected and disconnected…
Jian Liang, Keh-Fei LiuAug 27, 2020
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Electrical conductivity of the quark-gluon plasma: perspective from lattice QCD
A discussion on the electrical conductivity of the quark-gluon plasma as determined by lattice QCD is given. After a reminder of basic definitions and expectations, various methods for spectral…
Gert Aarts, Aleksandr NikolaevAug 27, 2020
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