Bhattacharya, Kaushik ; Sahu, Narendra ; Sarkar, Utpal ; Singh, Santosh K. (2006) Leptogenesis and low energy CP phases with two heavy neutrinos Physical Review D - Particles, Fields, Gravitation and Cosmology, 74 (9). 093001 _1-093001 _12. ISSN 1550-7998
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Official URL: http://prd.aps.org/abstract/PRD/v74/i9/e093001
Related URL: http://dx.doi.org/10.1103/PhysRevD.74.093001
Abstract
An attractive explanation for non-zero neutrino masses and small matter antimatter asymmetry of the present Universe lies in "leptogenesis". At present the size of the lepton asymmetry is precisely known, while the sign is not known yet. In this work we determine the sign of this asymmetry in the framework of two right handed neutrino models by relating the leptogenesis phase(s) with the low energy CP violating phases appearing in the leptonic mixing matrix. It is shown that the knowledge of low energy lepton number violating re-phasing invariants can indeed determine the sign of the present matter antimatter asymmetry of the Universe and hence indirectly probing the light physical neutrinos to be Majorana type.
Item Type: | Article |
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Source: | Copyright of this article belongs to The American Physical Society. |
ID Code: | 45416 |
Deposited On: | 28 Jun 2011 05:19 |
Last Modified: | 18 May 2016 01:41 |
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