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arXiv · 1711.11182

The electron-flavored Z'-portal dark matter and the DAMPE cosmic ray excess

Wei Chao·Qiang Yuan
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Abstract

The DAMPE experiment has recently reported strong indications for the existence of an excess of high-energy electrons and positrons. If interpreted in terms of the annihilation of dark matter, the DAMPE result restricts the dark matter mass and possible annihilation channels to a few case. In this paper we explain the DAMPE result with the electron-flavored $Z^\prime$-portal fermionic dark matter. We show that the Dirac dark matter scenario is promising to explain the excess via the process $\bar χχ\to\mathbf{Z}'\to \bar e e$. The reduced annihilation cross section is limited in a range of $10^{-26}\sim 10^{-24}~{\rm cm^3 s^{-1}}$ to interpret the excess.

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Wei Chao, Qiang Yuan. 2017-12-04. The electron-flavored Z'-portal dark matter and the DAMPE cosmic ray excess. https://arxiv.org/abs/1711.11182

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