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Axion Couplings in Gauged $U(1)'$ Extensions of the Standard Model

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arxiv 2211.12155 v1 pith:6LZEKMKS submitted 2022-11-22 hep-ph

classification hep-ph
keywords axioneffectivegaugedmodelbaryoncouplingsgammanumber
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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 $\{m_{Z'}, g_B\}$, $\{m_a, G_{a \gamma \gamma} \}$, and $\{m_a, f_a^{-1}\}$ planes.

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  1. Quark-universal $U(1)$ breaking scalar at the LHC

    hep-ph 2025-06 conditional novelty 6.0 of 10

    In a quark-universal U(1)_B model, the scalar φ that breaks the symmetry can be discovered first through its diphoton decay, and its rate can explain the 95 GeV diphoton excess.

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