An improved single-plaquette gauge action

Banerjee, Debasish; Bögli, Michael; Holland, Kieran; Niedermayer, Ferenc; Pepe, Michele; Wenger, Urs; Wiese, Uwe-Jens (2016). An improved single-plaquette gauge action. Journal of High Energy Physics, 2016(3) Springer 10.1007/JHEP03(2016)116

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We describe and test a nonperturbatively improved single-plaquette lattice action for 4-d SU(2) and SU(3) pure gauge theory, which suppresses large fluctuations of the plaquette, without requiring the naive continuum limit for smooth fields. We tune the action parameters based on torelon masses in moderate cubic physical volumes, and investigate the size of cut-off effects in other physical quantities, including torelon masses in asymmetric spatial volumes, the static quark potential, and gradient flow observables. In 2-d O(N) models similarly constructed nearest-neighbor actions have led to a drastic reduction of cut-off effects, down to the permille level, in a wide variety of physical quantities. In the gauge theories, we find significant reduction of lattice artifacts, and for some observables, the coarsest lattice result is very close to the continuum value. We estimate an improvement factor of 40 compared to using the Wilson gauge action to achieve the same statistical accuracy and suppression of cut-off effects.

Item Type:

Journal Article (Original Article)

Division/Institute:

10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC)
08 Faculty of Science > Institute of Theoretical Physics

UniBE Contributor:

Banerjee, Debasish; Bögli, Michael; Holland, Kieran; Niedermayer, Ferenc; Pepe, Michele; Wenger, Urs and Wiese, Uwe-Jens

Subjects:

500 Science > 530 Physics

ISSN:

1029-8479

Publisher:

Springer

Language:

English

Submitter:

Esther Fiechter

Date Deposited:

06 May 2016 14:24

Last Modified:

28 Jul 2016 09:17

Publisher DOI:

10.1007/JHEP03(2016)116

ArXiv ID:

1512.04984

BORIS DOI:

10.7892/boris.80304

URI:

https://boris.unibe.ch/id/eprint/80304

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