We detect a line at 3.539±0.011 keV in the deep exposure data set of the Galactic center
region, observed with the x-ray multi-mirror mission Newton. The dark matter interpretation …

We examine the claimed excess X-ray line emission near 3.5 keV including both a new
analysis of XMM–Newton observations of the Milky Way centre and a reanalysis of the data …

We explore a two component dark matter model with a fermion and a scalar. In this scenario
the Standard Model (SM) is extended by a fermion, a scalar and an additional pseudo …

We consider the freeze-in production of 7 keV axino dark matter (DM) in the supersymmetric
Dine-Fischler-Srednicki-Zhitnitsky (DFSZ) model in light of the 3.5 keV line excess. The …

Axino and gravitino are promising candidates to solve the dark matter (DM) problem in the
framework of supersymmetry. In this work, we assume that the axino is the lightest …

A bstract A two component model of nonthermal dark matter is formulated to simultaneously
explain the Fermi-LAT results indicating a γ-ray excess observed from our Galactic Centre in …

We further explore a scenario in which the recently observed 3.55 keV photon line arises
from dark matter decay to an axion-like particle (ALP) of energy 3.55 keV, which then …

Non-observation of any dark matter signature at various direct detection experiments over
the last decade keeps indicating that immensely popular WIMP paradigm may not be the …

In R-parity violating supersymmetry, the gravitino as the lightest supersymmetric particle
(LSP) is a good candidate for dark matter, with the interesting characteristic to be detectable …

In 2014, several groups reported hints for a yet unidentified line in astrophysical x-ray
signals from galaxies and galaxy clusters at an energy of 3.5 keV. While it is not unlikely that …