Neutrino and axion bounds from the globular cluster M5 (NGC 5904)

Download
  1. Get@NRC: Neutrino and axion bounds from the globular cluster M5 (NGC 5904) (Opens in a new window)
DOIResolve DOI: http://doi.org/10.1103/PhysRevLett.111.231301
AuthorSearch for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for:
TypeArticle
Journal titlePhysical Review Letters
ISSN0031-9007
Volume111
Issue23
Article number231301
SubjectBohr magnetons; Confidence limit; Globular clusters; High-precision; Stellar evolutions; Systematic uncertainties; Elementary particles; Uncertainty analysis
AbstractThe 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.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC)
Peer reviewedYes
NPARC number21270922
Export citationExport as RIS
Report a correctionReport a correction
Record identifier2bbb9d9c-a77c-430d-85af-890dde2ae4f6
Record created2014-02-18
Record modified2016-05-09
Bookmark and share
  • Share this page with Facebook (Opens in a new window)
  • Share this page with Twitter (Opens in a new window)
  • Share this page with Google+ (Opens in a new window)
  • Share this page with Delicious (Opens in a new window)