* Astronomy

Title: Split Two-Higgs-Doublet Model and Neutrino Condensation
Authors: Authors: Fei Wang, Wenyu Wang, Jin Min Yang
(revised v3)

We split the two-Higgs-doublet model by assuming very different vevs for the two doublets: the vev is at weak scale (174 GeV) for the doublet \Phi_1 and at neutrino-mass scale (10^-2 ~ 10^-3 eV) for the doublet \Phi_2. \Phi_1 is responsible for giving masses to all fermions except neutrinos; while \Phi_2 is responsible for giving neutrino masses through its tiny vev without introducing see-saw mechanism. Among the predicted five physical scalars H, h, A° and H^±, the CP-even scalar h is as light as 10^-2 ~ 10^-3eV while 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 A° and the charged H^± are the exotic scalars to be discovered at future colliders. Also we demonstrate a possible dynamical origin for the doublet \Phi_2 from neutrino condensation caused by some unknown dynamics.

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