• Open Access

Constraints on the box-shaped cosmic ray electron feature from dark matter annihilation with the AMS-02 and DAMPE data

Lei Zu, Cun Zhang, Lei Feng, Qiang Yuan, and Yi-Zhong Fan
Phys. Rev. D 98, 063010 – Published 19 September 2018

Abstract

Precise measurements of spectra of cosmic ray electrons and positrons can effectively probe the nature of dark matter (DM) particles. In a class of models where DM particles initially annihilate into a pair of intermediate particles which then decay into standard model particles, box-shaped spectra can be generated. Such spectra are distinct from astrophysical backgrounds and can probably be regarded as characteristic features of the DM annihilation. In this work, we search for such a feature in the total electron plus positron spectrum measured by AMS-02 and DAMPE. No significant evidence for such a DM annihilation component has been found. The 95% confidence level upper limits of the velocity-weighted annihilation cross section are derived, which range from 1026cm3s1 for DM mass of 50 GeV to 1023cm3s1 for DM mass of 10 TeV.

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  • Received 6 December 2017
  • Revised 10 August 2018

DOI:https://doi.org/10.1103/PhysRevD.98.063010

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.

Published by the American Physical Society

Physics Subject Headings (PhySH)

Particles & FieldsGravitation, Cosmology & Astrophysics

Authors & Affiliations

Lei Zu1,2, Cun Zhang1,3, Lei Feng1,*, Qiang Yuan1,2,†, and Yi-Zhong Fan1,2,‡

  • 1Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008, China
  • 2School of Astronomy and Space Science, University of Science and Technology of China, Hefei 230026, Anhui, China
  • 3School of Physics, Nanjing University, Nanjing 210092, China

  • *Corresponding author. fenglei@pmo.ac.cn
  • Corresponding author. yuanq@pmo.ac.cn
  • Corresponding author. yzfan@pmo.ac.cn

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Issue

Vol. 98, Iss. 6 — 15 September 2018

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