| DOI | Resolve DOI: https://doi.org/10.1103/PhysRevLett.111.231301 |
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| Author | Search for: Viaux, N.; Search for: Catelan, M.; Search for: Stetson, P.B.1; Search for: Raffelt, G.G.; Search for: Redondo, J.; Search for: Valcarce, A.A.R.; Search for: Weiss, A. |
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| Affiliation | - National Research Council of Canada
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| Format | Text, Article |
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| Subject | Bohr magnetons; Confidence limit; Globular clusters; High-precision; Stellar evolutions; Systematic uncertainties; Elementary particles; Uncertainty analysis |
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| Abstract | 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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| Publication date | 2013 |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| NPARC number | 21270922 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 2bbb9d9c-a77c-430d-85af-890dde2ae4f6 |
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| Record created | 2014-02-18 |
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| Record modified | 2020-04-22 |
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