Fourth generation neutrinos as dark matter
| Autor: | S. Mohanty |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Physics
Particle physics Number density Astrophysics::High Energy Astrophysical Phenomena media_common.quotation_subject High Energy Physics::Phenomenology Dark matter General Engineering Astronomy and Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics Asymmetry Sphaleron Baryon asymmetry Space and Planetary Science Baryon density Fourth generation High Energy Physics::Experiment Neutrino Nuclear Experiment media_common |
| Zdroj: | EAS Publications Series. 36:193-195 |
| ISSN: | 1638-1963 1633-4760 |
| Popis: | 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 Ω m ~ 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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