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arXiv · 1704.03977

Ideal Walking Dynamics via a Gauged NJL Model

Jarno Rantaharju·Claudio Pica·Francesco Sannino
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Abstract

According to the Ideal Walking Technicolor paradigm large mass anomalous dimensions arise in gauged Nambu--Jona-Lasinio (NJL) models when the four-fermion coupling is sufficiently strong to induce spontaneous symmetry breaking in an otherwise conformal gauge theory. We therefore study the $SU(2)$ gauged NJL model with two adjoint fermions using lattice simulations. The model is in an infrared conformal phase at small NJL coupling while it displays a chirally broken phase at large NJL couplings. In the infrared conformal phase we find that the mass anomalous dimension varies with the NJL coupling reaching $\gamma_m \sim 1$ close to the chiral symmetry breaking transition, de facto making the present model the first explicit realization of the Ideal Walking scenario.

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Jarno Rantaharju, Claudio Pica, Francesco Sannino. 2017-04-13. Ideal Walking Dynamics via a Gauged NJL Model. https://doi.org/10.1103/physrevd.96.014512

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