近期活动

INPAC Seminars

Dark matter annihilation into right-handed neutrinos and the galactic center gamma-ray excess

Dr. Yi-Lei Tang (Peking University)
Fri, 2016-03-04 13:00 - 14:00
INPAC Meeting room(上海交通大学粒子物理宇宙学研究所,包玉刚图书馆东楼四楼(从北门进))

In this talk, we will discuss a specific case that the dark matter annihilate into right-handed neutrinos. We calculate the predicted gamma-ray excess from the galactic center and compare our results with the data from the Fermi-LAT. An approximately 10-60 GeV right-handed neutrino with heavier dark matter particle can perfectly explain the observed spectrum. The annihilation cross section ⟨σv⟩falls within the range 0.5-4×10−26cm3/s, which is roughly compatible with the WIMP annihilation cross section.