Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2008-10-30
Phys.Lett.B672:136-140,2009
Physics
High Energy Physics
High Energy Physics - Phenomenology
16 pages, 3 figures, LaTex, 2 eps files,text added
Scientific paper
10.1016/j.physletb.2009.01.017
The three electroweak doublet neutrinos $\nu_{e,\mu,\tau}$ of the Standard Model may acquire small seesaw masses, using either three Majorana fermion singlets $N$ or three Majorana fermion triplets $(\Sigma^+,\Sigma^0,\Sigma^-)$. It is well-known that the former accommodates the U(1) gauge symmetry $B-L$. It has also been shown some years ago that the latter supports a new $U(1)_X$ gauge symmetry. Here we study two variations of this $U(1)_X$, one for two $N$ and one $\Sigma$, the other for one $N$ and two $\Sigma$. Phenomenological consequences are discussed.
Adhikari Rathin
Erler Jens
Ma Ernest
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