Abstract
Recently some hints of the existence of γ-ray line around 130 GeV are reported according to the analysis of Fermi-LAT data. If confirmed it would be the first direct evidence to show the existence of new physics beyond the standard model. Here we suggest that using the forthcoming high energy resolution γ-ray detectors, such as CALET and DAMPE, we may test whether it is real line structure or just the background effect. For DAMPE like detector with designed energy resolution ∼1.5%, a line significance will reach 11σ for the same statistics as Fermi-LAT. For about 1.4 yr survey observation, DAMPE may detect a 5σ signal of such a γ-ray line.
Highlights
It was recently reported through an anlysis of the Fermi Large Area Telescope (Fermi-LAT) γ-ray data that there might be a monochromatic γ-ray line at energy ∼ 130 GeV [1, 2]
In this work we propose that this tentative γ-ray line structure can be tested with the forthcoming high energy resolution γ-ray detectors, such as CALorimeteric Electron Telescope (CALET1) and DArk Matter Particle Explorer (DAMPE, previously named TANSUO, [24])
In this work we propose to test the line hypothesis with the forthcoming high energy resolution detectors
Summary
It was recently reported through an anlysis of the Fermi Large Area Telescope (Fermi-LAT) γ-ray data that there might be a monochromatic γ-ray line at energy ∼ 130 GeV [1, 2]. The most recent search for γ-ray line in the Milky Way can marginally exclude the dark matter annihilation cross section ∼ 10−27 cm at 130 GeV [21]. In this work we propose that this tentative γ-ray line structure can be tested with the forthcoming high energy resolution γ-ray detectors, such as CALorimeteric Electron Telescope (CALET1) and DArk Matter Particle Explorer (DAMPE, previously named TANSUO, [24]). Both CALET and DAMPE are dedicated to detect the cosmic ray nuclei, electrons and γ-ray photons in a wide energy band with very high energy resolution.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
