期刊
PHYSICAL REVIEW LETTERS
卷 114, 期 21, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.114.211302
关键词
-
资金
- U.S. Department of Energy [DE-SC00012567, DE-SC0011090]
- Simons Foundation Investigator Grant [327942]
We formulate an effective field theory description for SU(2)(L) triplet fermionic dark matter by combining nonrelativistic dark matter with gauge bosons in the soft-collinear effective theory. For a given dark matter mass, the annihilation cross section to line photons is obtained with 5% precision by simultaneously including Sommerfeld enhancement and the resummation of electroweak Sudakov logarithms at next-to-leading logarithmic order. Using these results, we present more accurate and precise predictions for the gamma-ray line signal from annihilation, updating both existing constraints and the reach of future experiments.
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