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

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

2011-02-14

arxiv.org/abs/1102.2843v2

Phys.Rev.D83:074507,2011

Physics

High Energy Physics

High Energy Physics - Lattice

17 pages, 15 figures, 7 tables. Slight corrections in comparisons to published results -- final published version

Scientific paper

10.1103/PhysRevD.83.074507

We apply Schrodinger-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 gamma_m(g*) = 0.31(6).

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