Split two-Higgs-doublet model and neutrino condensationF. Wang1, W. Wang1 and J. M. Yang2, 1
1 Institute of Theoretical Physics, Academia Sinica - Beijing 100080, PRC
2 CCAST(World Laboratory) - P.O. Box 8730, Beijing 100080, PRC
received 29 May 2006; accepted in final form 14 September 2006
published online 7 October 2006
We split the two-Higgs-doublet model by assuming very different vevs for the two doublets: the vev is at weak scale (174) for the doublet and at neutrino-mass scale ( ) for the doublet . is responsible for giving masses to all fermions except neutrinos; while is responsible for giving neutrino masses through its tiny vev without introducing the see-saw mechanism. Among the predicted five physical scalars H, h, A0 and , the CP-even scalar h is as light as while the others are at weak scale. We identify h as the cosmic-dark-energy field and the other CP-even scalar H as the Standard Model Higgs boson; while the CP-odd A0 and the charged are the exotic scalars to be discovered at future colliders. Also we demonstrate a possible dynamical origin for the doublet from neutrino condensation caused by some unknown dynamics.
12.60.Fr - Extensions of electroweak Higgs sector.
12.60.Rc - Composite models.
14.60.Pq - Neutrino mass and mixing.
© EDP Sciences 2006