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New matter effects and BBN constraints for mass-varying neutrinos

Weiner, Neal and Zurek, Kathryn (2006) New matter effects and BBN constraints for mass-varying neutrinos. Physical Review D, 74 (2). Art. no. 023517. ISSN 1550-7998. doi:10.1103/physrevd.74.023517.

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The presence of light (m_A∼10^(−6)  eV) scalar fields in the early universe can modify the cosmology of neutrinos considerably by allowing their masses to vary on cosmological times. In this paper, we consider the effect of Planck-suppressed couplings of this scalar to electrons and show that such couplings easily can make new sterile states thermally inaccessible in the early universe, preserving the successes of big bang nucleosynthesis predictions. We consider the circumstances under which these effects give the proper initial conditions for recently considered models of neutrino dark energy, and consider limits from tests of the equivalence principle. The parameters which satisfy cosmological constraints naturally give rise to interesting signals in terrestrial neutrino oscillation experiments.

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Additional Information:© 2006 American Physical Society. (Received 27 January 2006; revised manuscript received 11 May 2006; published 17 July 2006) The work of N. Weiner was supported by NSF CAREER Grant No. PHY-0449818. The work of K. Zurek was supported by DE-FG03-00ER41132. We thank A. Nelson and E. Adelberger for useful discussions.
Funding AgencyGrant Number
Department of Energy (DOE)DE-FG03-00ER41132
Issue or Number:2
Classification Code:PACS numbers: 98.80.Ft, 14.60.Pq, 26.35.+c
Record Number:CaltechAUTHORS:20190619-113125980
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:96567
Deposited By: George Porter
Deposited On:19 Jun 2019 20:02
Last Modified:16 Nov 2021 17:21

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