TY - JOUR
T1 - Inert Higgs Doublet Dark Matter in Type-II Seesaw
AU - Chen, Chuan Hung
AU - Nomura, Takaaki
N1 - Funding Information:
We proposed the model which have inert Higgs doublet and Higgs triplet. The IHD provides the dark matter candidate. The Higgs triplet gives neutrino masses via triplet VEV: Type-II seesaw mechanism. We investigated the parameter region where new interaction of the model is dominant. Especially, we search for the possibility to accommodate relic density of the DM, neutrino masses, observed excess of positron/electron flux and positron fraction. Acknowledgments: This work is supported by the National Science Council of R.O.C. under Grant #: NSC-100-2112-M-006-014-MY3 (CHC) and NSC-102-2811-M-006-035 (TN). We also thank the National Center for Theoretical Sciences (NCTS) for supporting the useful facilities.
PY - 2016/4/1
Y1 - 2016/4/1
N2 - Weakly interacting massive particle (WIMP) as a dark matter (DM) candidate is further inspired by recent AMS-02 data, which confirm the excess of positron fraction observed earlier by PAMELA and Fermi-LAT experiments. Additionally, the excess of positron+electron flux is still significant in the measurement of Fermi-LAT. For solving the problem of massive neutrinos and observed excess of cosmic-ray by DM annihilation, we study the model with an inert Higgs doublet (IHD) in the framework of type-II seesaw mechanism by imposing a Z2 symmetry on the IHD, where the lightest particle of IHD is the DM candidate while the neutrino masses origin from the Higgs triplet in type-II seesaw model. We calculate the cosmic-ray production in our model and find that if leptonic triplet decays are dominant, the observed excess of positron/electron flux could be explained well in normal ordered neutrino mass spectrum, when the constraints of DM relic density and comic-ray antiproton spectrum are taken into account.
AB - Weakly interacting massive particle (WIMP) as a dark matter (DM) candidate is further inspired by recent AMS-02 data, which confirm the excess of positron fraction observed earlier by PAMELA and Fermi-LAT experiments. Additionally, the excess of positron+electron flux is still significant in the measurement of Fermi-LAT. For solving the problem of massive neutrinos and observed excess of cosmic-ray by DM annihilation, we study the model with an inert Higgs doublet (IHD) in the framework of type-II seesaw mechanism by imposing a Z2 symmetry on the IHD, where the lightest particle of IHD is the DM candidate while the neutrino masses origin from the Higgs triplet in type-II seesaw model. We calculate the cosmic-ray production in our model and find that if leptonic triplet decays are dominant, the observed excess of positron/electron flux could be explained well in normal ordered neutrino mass spectrum, when the constraints of DM relic density and comic-ray antiproton spectrum are taken into account.
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U2 - 10.1016/j.nuclphysbps.2015.09.387
DO - 10.1016/j.nuclphysbps.2015.09.387
M3 - Article
AN - SCOPUS:84973130072
VL - 273-275
SP - 2348
EP - 2350
JO - Nuclear and Particle Physics Proceedings
JF - Nuclear and Particle Physics Proceedings
SN - 2405-6014
ER -