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arxiv: 1102.2843 · v2 · pith:A4GMURS6new · submitted 2011-02-14 · ✦ hep-lat · hep-ph

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

Thomas DeGrand (University of Colorado) , Yigal Shamir , Benjamin Svetitsky (Tel Aviv University) This is my paper
classification ✦ hep-lat hep-ph
keywords pointfixedadjointfermionsgaugeinfraredtheoryanomalous
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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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  1. SU(2) gauge theory with one and two adjoint fermions towards the continuum limit

    hep-lat 2024-07 unverdicted novelty 5.0

    Extended lattice simulations yield continuum-limit anomalous dimensions γ* = 0.170(6) for Nf=1 and γ* = 0.291(9) for Nf=2 adjoint SU(2), with chiral perturbation theory ruling out spontaneous chiral symmetry breaking.