Breaking of B-L in superstring inspired E6 model

Details Breaking of B-L in superstring inspired E6 model Breaking of B-L in superstring inspired E6 model

2004-12-14

arxiv.org/abs/hep-ph/0412196v3

J. Phys. G: Nucl. Part. Phys. 31 (2005) 1191-1206

Physics

High Energy Physics

High Energy Physics - Phenomenology

18 pages, 6 tables, axodraw used

Scientific paper

10.1088/0954-3899/31/11/006

In the framework of the superstring inspired E6 model, low-energy extensions of the standard model compatible with leptogenesis are considered and masses of right-handed neutrinos in two scenarios allowed by long-lived protons are discussed. The presence of two additional generations allows breaking of B-L without generating nonzero vacuum expectation values of right-handed sneutrinos of the three known generations. After the symmetry breaking, right-handed neutrinos acquire Majorana masses of order of 10^11 GeV. Within the framework of a simple discrete symmetry, assumptions made to provide a large mass of right-handed neutrinos are shown to be self-consistent. Supersymmetric structure of the theory ensures that large corrections, associated with the presence of a (super)heavy gauge field, cancel out.

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