Chiral perturbation theory for nonzero chiral imbalance
Domènec Espriu,
Angel Gómez Nicola,
Andrea Vioque-Rodríguez
Abstract:We construct the most general low-energy effective lagrangian including local parity violating terms parametrized by an axial chemical potential or chiral imbalance µ5, up to O(p 4 ) order in the chiral expansion for two light flavours. For that purpose, we work within the Chiral Perturbation Theory framework where only pseudo-NGB fields are included, following the external source method. The O(p 2 ) lagrangian is only modified by constant terms, while the O(p 4 ) one includes new terms proportional to µ 2 5 a… Show more
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