Two component dark matter: a possible explanation of 130 GeV γ-ray line from the galactic centre

Abstract

Recently there has been a hint of a gamma-ray line at 130 GeV originated from\nthe galactic centre after the analysis of the Fermi-LAT satellite data. Being\nmonochromatic in nature, it rules out the possibility of having its\nastrophysical origin and there has been a speculation that this line could be\noriginated from dark matter annihilation. In this work, we propose a two\ncomponent dark matter scenario where an extension of the Standard model by an\ninert Higgs doublet and a gauge singlet scalar concocted with $\\rm {Z_2 \\times\nZ^{\\prime}_2}$ symmetry, is considered. We find that our scenario can not only\nexplain the 130 GeV gamma-ray line through dark matter annihilation but also\nproduce the correct dark matter relic density. We have used the Standard Model\nHiggs mass around 125 GeV as intimated by the LHC data..\n