Volume 76, Number 3, November 2006
|Page(s)||388 - 394|
|Section||The physics of elementary particles and fields|
|Published online||07 October 2006|
Split two-Higgs-doublet model and neutrino condensation
Institute of Theoretical Physics, Academia Sinica - Beijing 100080, PRC
2 CCAST(World Laboratory) - P.O. Box 8730, Beijing 100080, PRC
Accepted: 14 September 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.
PACS: 12.60.Fr – Extensions of electroweak Higgs sector / 12.60.Rc – Composite models / 14.60.Pq – Neutrino mass and mixing
© EDP Sciences, 2006
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