TY - JOUR

T1 - Zero of the discrete beta function in SU(3) lattice gauge theory with color sextet fermions

AU - Shamir, Yigal

AU - Svetitsky, Benjamin

AU - Degrand, Thomas

PY - 2008/8/15

Y1 - 2008/8/15

N2 - We have carried out a Schrodinger functional calculation for the SU(3) lattice gauge theory with two flavors of Wilson fermions in the sextet representation of the gauge group. We find that the discrete beta function, which governs the change in the running coupling under a discrete change of spatial scale, changes sign when the Schrodinger functional renormalized coupling is in the neighborhood of g2=2.0. The simplest explanation is that the theory has an infrared-attractive fixed point, but more complicated possibilities are allowed by the data. While we compare rescalings by factors of 2 and 4/3, we work at a single lattice spacing.

AB - We have carried out a Schrodinger functional calculation for the SU(3) lattice gauge theory with two flavors of Wilson fermions in the sextet representation of the gauge group. We find that the discrete beta function, which governs the change in the running coupling under a discrete change of spatial scale, changes sign when the Schrodinger functional renormalized coupling is in the neighborhood of g2=2.0. The simplest explanation is that the theory has an infrared-attractive fixed point, but more complicated possibilities are allowed by the data. While we compare rescalings by factors of 2 and 4/3, we work at a single lattice spacing.

UR - http://www.scopus.com/inward/record.url?scp=49749111121&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.78.031502

DO - 10.1103/PhysRevD.78.031502

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AN - SCOPUS:49749111121

SN - 1550-7998

VL - 78

JO - Physical Review D - Particles, Fields, Gravitation and Cosmology

JF - Physical Review D - Particles, Fields, Gravitation and Cosmology

IS - 3

M1 - 031502

ER -