Gradient flow running coupling in SU(2) gauge theory with N-f=8 fundamental flavors

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http://hdl.handle.net/10138/209960

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Leino , V , Rantaharju , J , Rantalaiho , T , Rummukainen , K , Suorsa , J & Tuominen , K 2017 , ' Gradient flow running coupling in SU(2) gauge theory with N-f=8 fundamental flavors ' , Physical Review D , vol. 95 , no. 11 , 114516 . https://doi.org/10.1103/PhysRevD.95.114516

Title: Gradient flow running coupling in SU(2) gauge theory with N-f=8 fundamental flavors
Author: Leino, Viljami; Rantaharju, Jarno; Rantalaiho, Teemu; Rummukainen, Kari; Suorsa, Joni; Tuominen, Kimmo
Contributor: University of Helsinki, Department of Physics
University of Helsinki, Department of Physics
University of Helsinki, Department of Physics
University of Helsinki, Department of Physics
University of Helsinki, Department of Physics
Date: 2017-06-29
Language: eng
Number of pages: 14
Belongs to series: Physical Review D
ISSN: 2470-0010
URI: http://hdl.handle.net/10138/209960
Abstract: We study the evolution of the coupling in SU(2) gauge field theory with N-f = 8 fundamental fermion flavors on the lattice. This model is expected to have an infrared fixed point at high coupling. We use HEX-smeared Wilson-clover action, and measure the gradient flow running coupling with Dirichlet boundary conditions. Extrapolating our results to continuum, we find an infrared fixed point at g(*)(2) = 8.24(59)(-1.64)(+0.97), with statistical and systematic error estimates. We also measure the anomalous dimension of the quark mass operator, and find its value at the fixed point. gamma(*) similar or equal to 0.15 +/- 0.02, although for this quantity a reliable continuum limit is still lacking.
Subject: HYBRID MONTE-CARLO
LATTICE QCD
QUARK MASS
IMPROVEMENT
114 Physical sciences
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