Journal
PHYSICAL REVIEW D
Volume 83, Issue 12, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.83.123511
Keywords
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Funding
- Ministry of Education, Science, Sports, and Culture (MEXT), Japan [20244037, 20540252, 22244021, 14102004, 21111006, 22244030, 18071001, 22540263]
- World Premier International Research Center Initiative (WPI Initiative), MEXT, Japan
- Center for the Promotion of Integrated Sciences (CPIS) of Sokendai
- Grants-in-Aid for Scientific Research [20540252, 21111006, 18071001, 22244030, 11J05622, 23540327, 22540267] Funding Source: KAKEN
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We derive cosmological constraints on the annihilation cross section of dark matter with velocity-dependent structure, motivated by annihilating dark matter models through Sommerfeld or Breit-Wigner enhancement mechanisms. In models with an annihilation cross section increasing with decreasing dark matter velocity, a big-bang nucleosynthesis and cosmic microwave background give stringent constraints. Particularly, if the cross section is enhanced by a factor larger than 10(3), the thermal relic scenario is excluded for the dark matter lighter than O(TeV).
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