Infrared fixed point in SU(2) gauge theory with adjoint fermions

Thomas Degrand; Yigal Shamir; Benjamin Svetitsky

doi:10.1103/PhysRevD.83.074507

Infrared fixed point in SU(2) gauge theory with adjoint fermions

Thomas Degrand^*
, Yigal Shamir
, Benjamin Svetitsky

^*Corresponding author for this work

School of Physics and Astronomy

University of Colorado Boulder

Research output: Contribution to journal › Article › peer-review

102 Scopus citations

Abstract

We apply Schrödinger-functional techniques to the SU(2) lattice gauge theory with N_f=2 flavors of fermions in the adjoint representation. Our use of hypercubic smearing enables us to work at stronger couplings than did previous studies, before encountering a critical point and a bulk phase boundary. Measurement of the running coupling constant gives evidence of an infrared fixed point g_* where 1/g*2=0.20(4)(3). At the fixed point, we find a mass anomalous dimension γ_m(g _*)=0.31(6).

Original language	English
Article number	074507
Journal	Physical Review D - Particles, Fields, Gravitation and Cosmology
Volume	83
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevD.83.074507
State	Published - 21 Apr 2011

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Infrared fixed point in SU(2) gauge theory with adjoint fermions

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