Dark photon Bremsstrahlung and ultra-high-energy cosmic ray
Issued Date
2024-05-01
Resource Type
ISSN
22126864
Scopus ID
2-s2.0-85184074617
Journal Title
Physics of the Dark Universe
Volume
44
Rights Holder(s)
SCOPUS
Bibliographic Citation
Physics of the Dark Universe Vol.44 (2024)
Suggested Citation
Tantirangsri P., Samart D., Pongkitivanichkul C. Dark photon Bremsstrahlung and ultra-high-energy cosmic ray. Physics of the Dark Universe Vol.44 (2024). doi:10.1016/j.dark.2024.101432 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/97151
Title
Dark photon Bremsstrahlung and ultra-high-energy cosmic ray
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Author's Affiliation
Corresponding Author(s)
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Abstract
A dark photon is a hypothetical particle that is similar to a photon with a small mass and interacts very weakly with ordinary matter through a kinetic mixing with the ordinary photon. In this paper, we propose a new way to probe the existence of dark photons through the Bremsstrahlung effect on ultra-high-energy cosmic rays (UHECRs). Using the standard soft photon calculation, we demonstrate that the dark photon Bremsstrahlung process could lead to significant energy loss for protons in the ultralight dark photon scenario, and that this effect could be tested against observational data of UHECRs. We also provide exclusion limits which can be compared with existing limits on ultralight dark photons.