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

Understand

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).