Phys. Rev. D 65, 023511 (2001) [6 pages]Constraining neutrino physics with big bang nucleosynthesis and cosmic microwave background radiationReceived 4 June 2001; published 21 December 2001 We perform a likelihood analysis of the recent results on the anisotropy of cosmic microwave background radiation from the BOOMERanG and DASI experiments to show that they single out an effective number of neutrinos in good agreement with standard big bang nucleosynthesis. We also consider degenerate big bang nucleosynthesis to provide new bounds on effective relativistic degrees of freedom Nν and, in particular, on the neutrino chemical potential ξα. When including supernova type Ia data we find, at 2σ, Nν<~7 and -0.01<~ξe<~0.22, |ξμ,τ|<~2.6. © 2001 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevD.65.023511
DOI:
10.1103/PhysRevD.65.023511
PACS:
98.80.Cq, 04.50.+h, 95.35.+d, 98.70.Vc
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.