Hostname: page-component-cd9895bd7-fscjk Total loading time: 0 Render date: 2024-12-28T01:54:02.897Z Has data issue: false hasContentIssue false
  • English
  • Français

Fourth generation neutrinos as dark matter

Published online by Cambridge University Press:  30 May 2009

E. Pécontal ,
T. Buchert ,
Ph. Di Stefano ,
Y. Copin  and
S. Mohanty
S. Mohanty*
Affiliation:
Physical Research Laboratory, India
Get access

Abstract

A pseudo-Dirac neutrino of mass 50–100 GeV and mass splitting of 5 GeV can be a good candidate for dark matter. The number density of such dark matter should be close the the baryon density in order to get a dark matter density Ωm ~ 0.25. Production of heavy neutrinos by electro-weak sphaleron processes can ensure that the heavy neutrino asymmetry be of the same order as the baryon asymmetry. A mass splitting of the order.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 36: Dark Energy and Dark Matter: Observations, Experiments and Theories , 2009 , pp. 193 - 195
Copyright
© EAS, EDP Sciences, 2009

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Ahlen, S.P., Avignone, F.T., Brodzinski, R.L., et al., 1987, Phys. Lett. B, 195, 603 CrossRef
Hut, P., & Olive, K.A., 1979, Phys. Lett. B, 87, 144 CrossRef
Lee, B.W., & Weinberg, S., 1977, Phys. Rev. Lett., 39, 165 CrossRef
Sarkar, U., private communication