Possible explanation of indirect gamma ray signatures from hidden sector fermionic dark matter Amit Dutta Banik, Debasish Majumdar and Anirban Biswas Eur. Phys. J. C, 76 6 (2016) 346 Published online: 23 June 2016 DOI: 10.1140/epjc/s10052-016-4159-9