The infrared dynamics of Minimal Walking Technicolor

Abstract

We study the gauge sector of Minimal Walking Technicolor, which is an SU(2) gauge theory with nf=2 flavors of Wilson fermions in the adjoint representation. Numerical simulations are performed on lattices Nt x Ns^3, with Ns ranging from 8 to 16 and Nt=2Ns, at fixed β=2.25, and varying the fermion bare mass m0, so that our numerical results cover the full range of fermion masses from the quenched region to the chiral limit. We present results for the string tension and the glueball spectrum. A comparison of mesonic and gluonic observables leads to the conclusion that the infrared dynamics is given by an SU(2) pure Yang-Mills theory with a typical energy scale for the spectrum sliding to zero with the fermion mass. The typical mesonic mass scale is proportional to, and much larger than this gluonic scale. Our findings are compatible with a scenario in which the massless theory is conformal in the infrared. An analysis of the scaling of the string tension with the fermion mass towards the massless limit allows us to extract the chiral condensate anomalous dimension γ*, which is found to be γ*=0.22+-0.06.

29 pages, 16 figures

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Cited by in corpus (13)

• Bounds in 4D Conformal Field Theories with Global Symmetry
• Infrared fixed point in SU(2) gauge theory with adjoint fermions
• UV fixed-point structure of the three-dimensional Thirring model
• Conformal Window of Gauge Theories with Four-Fermion Interactions and Ideal Walking
• A Very Light Dilaton
• Running coupling constant of ten-flavor QCD with the Schrödinger functional method
• Meson-meson Scattering in QCD-like Theories
• Parity Doubling and the S Parameter Below the Conformal Window
• Flavor Dependence of the S-parameter
• Critical Number of Flavours in QED
• Lattice Monte-Carlo study of pre-conformal dynamics in strongly flavoured QCD in the light of the chiral phase transition at finite temperature
• Technicolor and Beyond: Unification in Theory Space
• Confining vs. conformal scenario for SU(2) with adjoint fermions. Gluonic observables