Anomalous X-ray galactic signal from 7.1 keV spin-3/2 dark matter decay

作者:Dutta Sukanta*; Goyal Ashok*; Kumar Sanjeev*
来源:Journal of Cosmology and Astroparticle Physics, 2016, 2016(2): 016.
DOI:10.1088/1475-7516/2016/02/016

摘要

In order to explain the recently reported peak at 3.55 keV in the galactic X-ray spectrum, we propose a simple model. In this model, the Standard Model is extended by including a neutral spin-3/2 vector-like fermion that transforms like a singlet under SM gauge group. This 7.1 keV spin-3/2 fermion is considered to comprise a portion of the observed dark matter. Its decay into a neutrino and a photon with decay life commensurate with the observed data, fits the relic dark matter density and obeys the astrophysical constraints from the supernova cooling.

  • 出版日期2016-2