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Axion-Like Particles in Radiative Quarkonia Decays

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arxiv 2402.12454 v1 pith:IRFNMPQR submitted 2024-02-19 hep-ph

Luca Di Luzio , Alfredo Walter Mario Guerrera , Xavier Ponce Díaz , Stefano Rigolin This is my paper · ORCID
classification hep-ph
keywords couplingsdecaysanalysisquarkoniavisibleaxion-likedecaygamma
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

Radiative quarkonia decays offer an ideal setting for probing Axion-Like Particle (ALP) interactions. This paper provides a comprehensive review of ALP production mechanisms through the $e^+ e^- \to \gamma\,a$ process at B- and Charm-factories, alongside an analysis of potential ALP decay channels. We derive constraints on ALP couplings to Standard Model (SM) fields, based on recent experimental results on quarkonia decays by the Belle II and BESIII collaborations. The analysis distinguishes between "invisible" and "visible" ALP decay scenarios. The "invisible" scenario, characterised by a mono-$\gamma$ plus missing-energy signature, enables stringent limits on ALP-photon and ALP-quark ($b$ or $c$) couplings. Moreover, extensive research at flavour factories has explored various "visible" ALP decays into SM final states, which depend on a larger set of ALP-SM couplings. To streamline the "visible" ALP scenario, we introduce additional theoretical assumptions, such as universal ALP-fermion couplings, or we adopt specific benchmark ALP models, aiming to minimise the number of independent variables in our analysis.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Constraints on axion-like particles using lattice QCD calculations of the rate for $J/\psi \to \gamma a$

    hep-lat 2025-02 conditional novelty 8.0 of 10

    First lattice QCD calculation of the J/psi to gamma plus axion-like-particle form factor, with under 2% uncertainty, used to update ALP constraints.

  2. Could an axion-like particle be hidden in $\eta_c\to\gamma\gamma$?

    hep-ph 2025-06 conditional novelty 5.0 of 10

    The authors propose that an axion-like particle with mass about 2.98 GeV and width about 31 MeV may explain the discrepancy in eta_c to gamma gamma measurements and show it is not yet excluded.

  3. New axion contribution to the two-photon decays of neutral pions

    hep-ph 2025-02 conditional novelty 5.0 of 10

    Axion-pion mixing adds a new next-to-leading-order term to the pi0 to gamma gamma decay width that is negligible for standard light axions but may matter for MeV-scale heavy axions.

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