Running coupling in SU(2) gauge theory with two adjoint fermions

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http://hdl.handle.net/10138/184734

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Rantaharju , J , Rantalaiho , T , Rummukainen , K & Tuominen , K 2016 , ' Running coupling in SU(2) gauge theory with two adjoint fermions ' , Physical Review D , vol. 93 , no. 9 , 094509 . https://doi.org/10.1103/PhysRevD.93.094509

Title: Running coupling in SU(2) gauge theory with two adjoint fermions
Author: Rantaharju, Jarno; Rantalaiho, Teemu; Rummukainen, Kari; Tuominen, Kimmo
Contributor: University of Helsinki, Department of Physics
University of Helsinki, Department of Physics
University of Helsinki, Department of Physics
Date: 2016-05-25
Language: eng
Number of pages: 10
Belongs to series: Physical Review D
ISSN: 2470-0010
URI: http://hdl.handle.net/10138/184734
Abstract: We study SU(2) gauge theory with two Dirac fermions in the adjoint representation of the gauge group on the lattice. Using clover improved Wilson fermion action with hypercubic truncated stout smearing we perform simulations at larger coupling than before. We measure the evolution of the coupling constant using the step scaling method with the Schrodinger functional and study the remaining discretization effects. At weak coupling we observe significant discretization effects, which make it difficult to obtain a fully controlled continuum limit. Nevertheless, the data remains consistent with the existence of a fixed point in the interval 2.2 less than or similar to g(*2) less than or similar to 3. We also measure the anomalous dimension and find that its value at the fixed point is gamma(*) similar or equal to 0.2 +/- 0.03.
Subject: QUARK MASS RENORMALIZATION
HYBRID-MONTE-CARLO
YANG-MILLS THEORY
SYMMETRY-BREAKING
LATTICE QCD
DYNAMICS
114 Physical sciences
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