Constraining axion-gluon coupling in monohadron processes

The axion-gluon coupling can be constrained directly through hard exclusive processes at the LHC. Specifically, we study the associated production of a long-lived axion with a ρ 0 meson in ultraperipheral A A collisions and in p p collisions. With the axion escaped from the detector, the final state...

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Bibliographic Details
Published in:Physical review. D 2024-09, Vol.110 (5), Article 055008
Main Authors: Bao, Shou-shan, Gao, Wenhai, Zhang, Hong, Zhou, Jian
Format: Article
Language:English
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Summary:The axion-gluon coupling can be constrained directly through hard exclusive processes at the LHC. Specifically, we study the associated production of a long-lived axion with a ρ 0 meson in ultraperipheral A A collisions and in p p collisions. With the axion escaped from the detector, the final state is characterized by a monohadron signature. The main background in our analysis originates from the ρ 0 + π 0 process, where the photons from the π 0 decay are undetected due to limited detector performance. Our analysis yields an exclusion limit of the axion-gluon coupling that is comparable to the limit obtained from the monojet process at the LHC.
ISSN:2470-0010
2470-0029
DOI:10.1103/PhysRevD.110.055008