1108.1368 (Paramita Dey et al.)

Constraints on axino warm dark matter from X-ray observation at the
Chandra telescope and SPI    [PDF]

Paramita Dey, Biswarup Mukhopadhyaya, Sourov Roy, Sudhir K. Vempati

A sufficiently long lived warm dark matter could be a source of X-rays observed by satellite based X-ray telescopes. We consider axinos and gravitinos with masses between 1 keV and 100 keV in supersymmetric models with small R-parity violation. We show that axino dark matter receives significant constraints from X-ray observations of Chandra and SPI, especially for the lower end of the allowed range of the axino decay constant $f_{a}$, while the gravitino dark matter remains unconstrained.

View original: http://arxiv.org/abs/1108.1368