Two-portal dark matter

Karim Ghorbani and Hossein Ghorbani
Phys. Rev. D 91, 123541 – Published 29 June 2015

Abstract

We propose a renormalizable dark matter model in which a fermionic dark matter (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) gauge symmetry while the standard model has a leptophobic interaction with the dark vector boson. The leading contribution of the DM-nucleon elastic scattering cross section 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 34GeV annihilating into b quark pair, which explains the Fermi-LAT gamma-ray excess.

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  • Received 20 May 2015

DOI:https://doi.org/10.1103/PhysRevD.91.123541

© 2015 American Physical Society

Authors & Affiliations

Karim Ghorbani*

  • Physics Department, Faculty of Sciences, Arak University, Arak 38156-8-8349, Iran

Hossein Ghorbani

  • Institute for Research in Fundamental Sciences (IPM) School of Particles and Accelerators, P.O. Box 19395-5531, Tehran, Iran

  • *kghorbani@ipm.ir
  • pghorbani@ipm.ir

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Issue

Vol. 91, Iss. 12 — 15 June 2015

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