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

Thomas Degrand, Yigal Shamir, Benjamin Svetitsky

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We apply Schrödinger-functional techniques to the SU(2) lattice gauge theory with Nf=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 γm(g *)=0.31(6).

Original languageEnglish
Article number074507
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number7
StatePublished - 21 Apr 2011


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