A4 see-saw models and form dominance
Chen, Mu-Chun and King, Stephen F. (2009) A4 see-saw models and form dominance. Journal of High Energy Physics, 2009, (6), 072. (doi:10.1088/1126-6708/2009/06/072).
We introduce the idea of Form Dominance in the (type I) see-saw mechanism, according to which a particular right-handed neutrino mass eigenstate is associated with a particular physical neutrino mass eigenstate, leading to a form diagonalizable effective neutrino mass matrix. Form Dominance, which allows an arbitrary neutrino mass spectrum, may be regarded as a generalization of Constrained Sequential Dominance which only allows strongly hierarchical neutrino masses. We consider alternative implementations of the see-saw mechanism in minimal A4 see-saw models and show that such models satisfy Form Dominance, leading to neutrino mass sum rules which predict closely spaced neutrino masses with a normal or inverted neutrino mass ordering. To avoid the partial cancellations inherent in such models we propose Natural Form Dominance, in which a different flavon is associated with each physical neutrino mass eigenstate.
|Divisions:||University Structure - Pre August 2011 > School of Electronics and Computer Science > Communications Research Group
|Date Deposited:||25 May 2010 08:55|
|Last Modified:||02 Mar 2012 12:15|
|Contributors:||Chen, Mu-Chun (Author)
King, Stephen F. (Author)
|Date:||23 June 2009|
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