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arXiv · 1106.3880

Comment on astrophysical consequences of a neutrinophilic 2HDM

Shun Zhou
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Abstract

Several authors have pointed out that the scalar-mediated interaction of neutrinos in a neutriophilic two-Higgs-doublet model (nu2HDM) can be as strong as electromagnetic interaction [1-3]. We show that the coupling constants of neutrino-scalar interaction are actually restricted to be y_i < 1.5 x 10^{-3} by supernova neutrino observation, and further constrained to be y_i < 2.3 x 10^{-4} by precision measurements of acoustic peaks of the cosmic microwave background. Based on the energy-loss argument for supernova cores, we derive a slightly more restrictive bound y_i < 3.5 x 10^{-5}. Therefore, the nu2HDM has lost its spirit of explaining tiny Dirac neutrino masses while keeping neutrino Yukawa couplings of order one.

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Shun Zhou. 2011-07-28. Comment on astrophysical consequences of a neutrinophilic 2HDM. https://doi.org/10.1103/physrevd.84.038701

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