“School of Particles”
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| Paper IPM / Particles / 13821 |
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| Abstract: | |||||
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We propose a renormalizable dark matter model in which a fermionic dark mat-ter (DM) candidate communicates with the standard model particles through two distinct portals: Higgs and vector portals. The dark sector is charged under a
U(1)â²gauge symmetry while the standard model has a leptophobic in teraction with the dark vector boson. The leading contribution of DM-nucleon elast ic scattering cross sec-tion begins at one-loop level. The model meets all the constraints imposed by direct detection experiments provided by LUX and XENON100, observed relic abundance according to WMAP and Planck, and the invisible Higgs decay width measured at the LHC. It turns out that the dark matter mass in the viable parameter space can take values from a few GeV up to 1 TeV. This is a new feature which is absent in the models with only one portal. In addition, we can find in the constrained regions of the parameter space a DM mass of â¼34 GeV annihilating into b quark pair, which
explains the Fermi-LAT gamma-ray excess
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