期刊
PHYSICAL REVIEW D
卷 89, 期 6, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.89.063539
关键词
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资金
- DFG
- Graduiertenkolleg Particle Physics at the Energy Frontier of New Phenomena
- ERC [267117]
- NSF [OIA-1124403]
- Office of Integrative Activities
- Office Of The Director [1124403] Funding Source: National Science Foundation
The AMS-02 Collaboration has recently presented high-quality measurements of the cosmic electron and positron fluxes as well as the positron fraction. We use the measurements of the positron flux to derive, for the first time, limits on the dark matter annihilation cross section and lifetime for various final states. Working under the well-motivated assumption that a background positron flux exists from spallations of cosmic rays with the interstellar medium and from astrophysical sources, we find strong limits on the dark matter properties which are competitive, although slightly weaker, than those derived from the positron fraction. Specifically, for dark matter particles annihilating only into e(+)e(-) or into mu(+)mu(-), our limits on the annihilation cross section are stronger than the thermal value when the dark matter mass is smaller than 100 GeV or 60 GeV, respectively.
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