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Revisiting the Bound on Axion-Photon Coupling from Globular Clusters
Open accessAbstract
We derive a strong bound on the axion-photon coupling g(aγ) from the analysis of a sample of 39 Galactic Globular Clusters. As recognized long ago, the R parameter, i.e., the number ratio of stars in horizontal over red giant branch of old stellar clusters, would be reduced by the axion production from photon conversions occurring in stellar cores. In this regard, we have compared the measured R with state-of-the-art stellar models obtained under different assumptions for g(aγ). We show that the estimated value of g(aγ) substantially depends on the adopted He mass fraction Y, an effect often neglected in previous investigations. Taking as a benchmark for our study the most recent determinations of the He abundance in H ii regions with O/H in the same range of the Galactic Globular Clusters, we obtain an upper bound g(aγ)<0.66×10(-10) GeV(-1) at 95% confidence level. This result significantly improves the constraints from previous analyses and is currently the strongest limit on the axion-photon coupling in a wide mass range.
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Citations
Cites
THE EFFECTS OF ROTATION ON s-PROCESS NUCLEOSYNTHESIS IN ASYMPTOTIC GIANT BRANCH STARS
Piersanti, L., Cristallo, S., & Straniero, O. (2013) · The Astrophysical Journal · doi:10.1088/0004-637x/774/2/98 · Cited by 127
Cited by
New experimental approaches in the search for axion-like particles
Irastorza, I. G., & Redondo, J. (2018) · Progress in Particle and Nuclear Physics · doi:10.1016/j.ppnp.2018.05.003 · Cited by 745
The landscape of QCD axion models
Di Luzio, L., Giannotti, M., Nardi, E., & Visinelli, L. (2020) · Physics Reports · doi:10.1016/j.physrep.2020.06.002 · Cited by 657
Self-citationSearch for New Physics in Electronic Recoil Data from XENONnT
Aprile, E., Abe, K., Agostini, F., Ahmed Maouloud, S., Althueser, L., Andrieu, B., Angelino, E., Angevaare, J. R., Antochi, V. C., Antón Martin, D., et al. (2022) · Physical Review Letters · doi:10.1103/physrevlett.129.161805 · Cited by 279
Metadata
- Authors
- Ayala, A., Domínguez, I., Giannotti, M., Mirizzi, A., & Straniero, O.
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 2014-11-04
- Volume
- 113
- Issue
- 19
- Pages
- 191302-191302
- ISSN
- 0031-9007 (ISSN-L)
- 1079-7114
- OpenAlex
- W2068732874
- Cited by
- 463
- References
- 1
- FWCI
- 8.19
- Type
- journal article
- Language
- en
- Open access
- green
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- Ayala, A., Domínguez, I., Giannotti, M., Mirizzi, A., & Straniero, O. (2014). Revisiting the Bound on Axion-Photon Coupling from Globular Clusters. Physical Review Letters. https://doi.org/10.1103/physrevlett.113.191302
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