Abstract
We discuss the role played by right-handed sterile neutrinos in the early universe. We show how the well known 4He constraint on the number of relativistic degrees of freedom at early times limits the equilibration of the right-handed neutrino sea with the background plasma. We discuss how this allows interesting constraints to be placed on neutrino properties. In particular, a new limit on the Dirac mass of the neutrino is presented.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
K. A. Olive, D. N. Schramm, G. Steigman and T. P. Walker, Phys. Lett. B236 (1990) 454.
B. E. J. Pagel in: “A Unified View of the Macro-and Micro-Cosmos” eds. A. DeRujula, D. V. Nanopoulos and P. A. Shaver ( World Scientific, Singapore, 1988 ) p. 399.
S. L. Shapiro, S. A. Teukolsky, and I. Wasserman, Phys. Rev. Lett. 45 (1980) 669.
A. Perez and R. Gandhi, preprint Fermilab-Pub-89/156-A, (1989).
G. M. Fuller and R. A. Malaney, Phys. Rev. D. submitted (1990).
M. Aguilar-Benitez, et al. (Particle Data Group), Phys. Lett. B204 (1988) 1.
E. W. Kolb and R. J. Scherrer, Phys. Rev. D25 (1982) 1481.
J. A. Morgan, Phys. Lett. B102 (1981) 247.
J. A. Grifols and E. Massó, Mod. Phys. Lett. A2, (1987) 205.
J. R. Bond, G. Efstathiou and J. Silk, Phys. Rev. Lett. 45 (1980) 1980.
K. A. Olive, D. N. Schramm and G. Steigman, Nuc. Phys. B180 (1981) 497.
M. Yu. Khlopov and S. T. Petcov, Phys. Lett. B99 (1981) 117.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1991 Springer Science+Business Media Dordrecht
About this paper
Cite this paper
Malaney, R.A., Fuller, G.M. (1991). Sterile Neutrinos in the Early Universe. In: Sato, K., Audouze, J. (eds) Primordial Nucleosynthesis and Evolution of Early Universe. Astrophysics and Space Science Library, vol 169. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-3410-1_13
Download citation
DOI: https://doi.org/10.1007/978-94-011-3410-1_13
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-5509-3
Online ISBN: 978-94-011-3410-1
eBook Packages: Springer Book Archive