期刊
PHYSICAL REVIEW LETTERS
卷 115, 期 2, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.115.021301
关键词
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资金
- U.S. National Science Foundation [PHY-1002399]
- Awardee of the Weizmann Institute of Science-National Postdoctoral Award Program for Advancing Women in Science
- NSF [PHY-1002399, PHY-1316222, PHY-1316783, PHY-0756174, PHYS-1066293]
- U.S. DOE [DE-AC02-05CH11231]
- JSPS [26400241, 26105507]
- EU-FP7 Marie Curie, CIG Fellowship
- I-CORE Program of the Planning Budgeting Committee
- Israel Science Foundation [1937/12]
- WPI, MEXT, Japan
- US-Israel Binational Science Foundation
- Grants-in-Aid for Scientific Research [26105507, 26400241] Funding Source: KAKEN
- Division Of Physics
- Direct For Mathematical & Physical Scien [1316222] Funding Source: National Science Foundation
- Division Of Physics
- Direct For Mathematical & Physical Scien [1002399, 1316783] Funding Source: National Science Foundation
A recent proposal is that dark matter could be a thermal relic of 3 -> 2 scatterings in a strongly coupled hidden sector. We present explicit classes of strongly coupled gauge theories that admit this behavior. These are QCD-like theories of dynamical chiral symmetry breaking, where the pions play the role of dark matter. The number-changing 3 -> 2 process, which sets the dark matter relic abundance, arises from the Wess-Zumino-Witten term. The theories give an explicit relationship between the 3 -> 2 annihilation rate and the 2 -> 2 self-scattering rate, which alters predictions for structure formation. This is a simple calculable realization of the strongly interacting massive-particle mechanism.
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