Search for gamma-ray lines in the Galaxy with DAMPE

Discussion timeslot (ZOOM-Meeting): 16. July 2021 - 18:00
ZOOM-Meeting URL: https://icrc2021.desy.de/pf_access_abstracts
Corresponding Session: https://icrc2021-venue.desy.de/channel/Presenter-Forum-1-Evening-All-Categories/48
Abstract:
'DArk Matter Particle Explorer (DAMPE) is a high energy cosmic-ray and gamma-ray observatory with an excellent energy resolution, and therefore has an advantage in searching for gamma-ray line structures. Based on the 5-yr DAMPE observation, we construct a dedicated data set for line search which balances the energy resolution and acceptance. We also make use of the photons converted in the BGO calorimeter. We use the summed unbinned likelihood with sliding windows technique and calculate the 95% confidence limits of the velocity-averaged cross section for `$chichi to gammagamma$` and the decay lifetime for `$chi to gammanu$`.'

Authors: Zun-Lei Xu
Co-Authors: Zhao-Qiang Shen | Kai-Kai Duan | Xiang Li | Mazziotta M. N. | on behalf of the DAMPE collaboration
Collaboration: DAMPE

Indico-ID: 891
Proceeding URL: https://pos.sissa.it/395/632