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تسجيل مستخدم جديدRenormalization group improvement of the effective potential in a (1+1) dimensional Gross-Neveu model
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In this work, we investigate the consequences of the Renormalization Group Equation (RGE) in the determination of the effective potential and the study of Dynamical Symmetry Breaking (DSB) in an Gross-Neveu (GN) model with N fermions fields in (1+1) dimensional space-time, which can be applied as a model to describe certain properties of the polyacetylene. The classical Lagrangian of the model is scale invariant, but radiative corrections to the effective potential can lead to dimensional transmutation, when a dimensionless parameter (coupling constant) of the classical Lagrangian is exchanged for a dimensionful one, a dynamically generated mass for the fermion fields. We have studied the behavior of the unimproved and improved effective potential and observed that the improvement of the effective potential shown an interesting performance in comparison with the unimproved case in the configuration of the minimum of potential. Therefore, we have calculated the improved effective potential up to six loops order using the leading logs approximation.
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