2014/09/12 by Patra, Sudhanwa, Pritimita, Prativa
#FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph)
paper · doi:10.48550/arxiv.1409.3656
The appearance of a 3.5 keV photon line in the X-ray spectra of Andromeda galaxy and other galaxy clusters including the Perseus galaxy can be interpreted as the signal of a 7 keV sterile neutrino dark matter candidate as one of the plausible explanations. We present here a novel framework of extended seesaw mechanism where the lightest sterile neutrino acts as a Dark Matter candidate and its decay into a photon and an ordinary neutrino accounts for the excess 3.5 keV X-ray line. For implementing the idea, we add two different types of neutral fermion singlets (SL, NR) to the SM light neutrino νL so that the light neutrino mass is governed by generic linear seesaw formula. We discuss the complementarity constraints on the model parameters including sterile-active neutrino mixing angle within the extended seesaw framework. Favorably, this framework can be embedded in a SO(10) grand unified theory.