期刊
PHYSICAL REVIEW LETTERS
卷 119, 期 6, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.119.061102
关键词
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资金
- Swiss National Science Foundation [200020-169696]
- Sinergia network [CRSII2-160814]
- NSF CAREER [PHY-1554858]
- NSF [PHY-1066293]
- Direct For Mathematical & Physical Scien
- Division Of Physics [1554858] Funding Source: National Science Foundation
We propose that the dark matter abundance is set by the decoupling of inelastic scattering instead of annihilations. This coscattering mechanism is generically realized if dark matter scatters against states of comparable mass from the thermal bath. Coscattering points to dark matter that is exponentially lighter than the weak scale and has a suppressed annihilation rate, avoiding stringent constraints from indirect detection. Dark matter upscatters into states whose late decays can lead to observable distortions to the blackbody spectrum of the cosmic microwave background.
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