DOI | Trouver le DOI : https://doi.org/10.1103/PhysRevLett.111.231301 |
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Auteur | Rechercher : Viaux, N.; Rechercher : Catelan, M.; Rechercher : Stetson, P.B.1; Rechercher : Raffelt, G.G.; Rechercher : Redondo, J.; Rechercher : Valcarce, A.A.R.; Rechercher : Weiss, A. |
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Affiliation | - Conseil national de recherches du Canada
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Format | Texte, Article |
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Sujet | Bohr magnetons; Confidence limit; Globular clusters; High-precision; Stellar evolutions; Systematic uncertainties; Elementary particles; Uncertainty analysis |
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Résumé | The red-giant branch (RGB) in globular clusters is extended to larger brightness if the degenerate helium core loses too much energy in "dark channels." Based on a large set of archival observations, we provide high-precision photometry for the Galactic globular cluster M5 (NGC 5904), allowing for a detailed comparison between the observed tip of the RGB with predictions based on contemporary stellar evolution theory. In particular, we derive 95% confidence limits of gae<4.3×10-13 on the axion-electron coupling and μν<4.5×10 -12μB (Bohr magneton μB=e/2me) on a neutrino dipole moment, based on a detailed analysis of statistical and systematic uncertainties. The cluster distance is the single largest source of uncertainty and can be improved in the future. © 2013 American Physical Society. |
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Date de publication | 2013 |
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Dans | |
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Langue | anglais |
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Publications évaluées par des pairs | Oui |
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Numéro NPARC | 21270922 |
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Exporter la notice | Exporter en format RIS |
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Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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Identificateur de l’enregistrement | 2bbb9d9c-a77c-430d-85af-890dde2ae4f6 |
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Enregistrement créé | 2014-02-18 |
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Enregistrement modifié | 2020-04-22 |
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