Mass anomalous dimension in sextet QCD

Details Mass anomalous dimension in sextet QCD Mass anomalous dimension in sextet QCD

2012-01-04

arxiv.org/abs/1201.0935v1

Physics

High Energy Physics

High Energy Physics - Lattice

9 pages, 8 figures

Scientific paper

We extend our previous study of the SU(3) gauge theory with N_f=2 flavors of fermions in the sextet representation of color. Our tool is the Schroedinger functional method. By changing the lattice action, we push the bulk transition of the lattice theory to stronger couplings and thus reveal the beta function and the mass anomalous dimension gamma_m over a wider range of coupling, out to g^2 ~ 11. Our results are consistent with an infrared fixed point, but walking is not ruled out. Our main result is that gamma_m never exceeds 0.45, making the model unsuitable for walking technicolor.

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