Center for Theoretical Physics of the Universe (CTPU)

Interpretations of the DAMPE electron data

by Lei Feng

Wednesday, 3 March 2021 from to (Asia/Seoul)
at zoom meeting
The DArk Matter Particle Explorer (DAMPE), a high energy cosmic ray and γ-ray detector in space, had reported the new measurement of the total electron plus positron flux between 25 GeV and 4.6 TeV. A spectral softening at ∼0.9 TeV and a tentative peak at ∼1.4 TeV have been reported. We discuss the physical implications of the DAMPE data in this lecture. The tentive peak at ∼1.4 TeV implies local sources of electrons/positrons with quasi-monochromatic injection spectrum and caused extensive discussions. The annihilation of DM particles (mχ∼1.5 TeV) into e+e− pairs in a nearby clump or an over-density region could explain the data. Otherwise, cold, ultra-relativistic e+e− winds from pulsars may also give rise to such a structure