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Log Triviality in the Nambu -- Jona-Lasinio Model

Simon Hands
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Abstract

Results are presented from a Monte Carlo simulation of the Nambu -- Jona-Lasinio model with SU(2)xSU(2) chiral symmetry and N_f=2 flavors of fermion. We show that fits to the equation of state are sensitive to the shape and extent of the assumed scaling region; the best fits favour a triviality scenario predicted by the large-N_f approximation, in which the scalar degrees of freedom are fermion -- anti-fermion composites with wavefunction renormalisation constant vanishing logarithmically in the continuum limit.

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Simon Hands. 1997-09-15. Log Triviality in the Nambu -- Jona-Lasinio Model. https://doi.org/10.1016/s0920-5632(97)00868-2

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