Axion couplings in gauged U(1)' extensions of the standard model

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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 {mZ′,gB}, {ma, Gaγγ}, and {ma,f−1a} planes.

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Journal of high energy physics, 2023, 3, Springer, Berlin ; Heidelberg, 2023, https://doi.org/10.1007/JHEP03(2023)078

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