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Article
Report number hep-ph/0612292 ; CERN-PH-TH-2006-181 ; CERN-PH-TH-2006-181
Title CP and Lepton-Number Violation in GUT Neutrino Models with Abelian Flavour Symmetries
Related titleCHARGE PARITY
GRAND UNIFIED THEORIES
FLAVOR
Author(s) Ellis, John R. (CERN) ; Gomez, Mario E. (Huelva U.) ; Lola, Smaragda (Patras U.)
Affiliation (CERN)
Publication 2007
Imprint 21 Dec 2006
Number of pages 28
In: JHEP 07 (2007) 052
DOI 10.1088/1126-6708/2007/07/052
Subject category Particle Physics - Phenomenology
Abstract We study the possible magnitudes of CP and lepton-number-violating quantities in specific GUT models of massive neutrinos with different Abelian flavour groups, taking into account experimental constraints and requiring successful leptogenesis. We discuss SU(5) and flipped SU(5) models that are consistent with the present data on neutrino mixing and upper limits on the violations of charged-lepton flavours and explore their predictions for the CP-violating oscillation and Majorana phases. In particular, we discuss string-derived flipped SU(5) models with selection rules that modify the GUT structure and provide additional constraints on the operators, which are able to account for the magnitudes of some of the coefficients that are often set as arbitrary parameters in generic Abelian models.
Copyright/License Open Access

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 记录创建於2006-12-26,最後更新在2023-03-14


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