Axion couplings in gauged U(1)′ extensions of the Standard Model

Abstract

Abstract We explore the effective theory of an axion in a gauged baryon number symmetry extension of the Standard Model (SM), where the axion is realized from a Dine-Fischler-Srednicki-Zhitnitsky (DFSZ) model construction. Integrating out the anomalons realizes a pattern of effective Wilson coefficients reflecting the factorization between the anomalous Peccei-Quinn and gauged baryon number symmetries. We construct and analyze the chiral transformation invariance of the axion effective theory, accounting for possible flavor-violating axion couplings. We calculate and study the unique phenomenology of the axion and Z′ boson, and we present the current collider limits on these particles in the $$ \left\{{m}_{Z^{\prime }},{g}_B\right\} $$ m Z ′ g B , {ma, Gaγγ}, and $$ \left\{{m}_a,{f}_a^{-1}\right\} $$ m a f a − 1 planes.