Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2002-11-25
Nucl.Phys. B658 (2003) 203-216
Physics
High Energy Physics
High Energy Physics - Phenomenology
18 pages, 8 figures; minor clarifications; version to appear in Nucl. Phys. B
Scientific paper
10.1016/S0550-3213(03)00188-3
We show that the electroweak symmetry can be broken in a natural and phenomenologically acceptable way by a neutrino condensate. Therefore, we assume as particle content only the chiral fermions and gauge bosons of the Standard Model and in addition right-handed neutrinos. A fundamental Higgs field is absent. We assume instead that new interactions exist that can effectively be described as four-fermion interactions and that can become critical in the neutrino sector. We discuss in detail the coupled Dirac-Majorana gap equations which lead to a neutrino condensate, electroweak symmetry breaking and via the dynamical see-saw mechanism to small neutrino masses. We show that the effective Lagrangian is that of the Standard Model with massive neutrinos and with a composite Higgs particle. The mass predictions are consistent with data.
Antusch Stefan
Kersten Joern
Lindner Manfred
Ratz Michael
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