U(2)xU(2)-symmetric fixed point from the Functional Renormalization Group

Abstract

The existence of an U(2)xU(2)-symmetric fixed point in the chiral linear sigma model is confirmed using the Functional Renormalization Group (FRG). Its stability properties and the implications for the order of the chiral phase transition of two-flavor quantum chromodynamics (QCD) are discussed. Furthermore, several technical conclusions are drawn from the comparison with the results of resummed loop expansions.

9 pages

References in corpus (5)

• Bootstrapping phase transitions in QCD and frustrated spin systems
• On the scaling behavior of the chiral phase transition in QCD in finite and infinite volume
• The QCD phase diagram: Results and challenges
• Fluctuation induced first order phase transition in U(n)xU(n) models using chiral invariant expansion of functional renormalization group flows
• Invariant formulation of the Functional Renormalisation Group method for $U(n)\times U(n)$ symmetric matrix models

Cited by in corpus (1)

• Linking $U(2)\times U(2)$ to $O(4)$ model via decoupling