期刊
PHYSICAL REVIEW D
卷 89, 期 3, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.89.035009
关键词
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资金
- NSF [PHY-1214648, 1066293, PHY-1342611]
- UCR
- DOE [DE-SC0007859, DE-SC0010137]
- NASA Astrophysics Theory [NNX11AI17]
- CETUP* (Center for Theoretical Underground Physics and Related Areas)
- Division Of Physics
- Direct For Mathematical & Physical Scien [1342611, 1214648] Funding Source: National Science Foundation
Dark matter self-interactions can affect the small scale structure of the Universe, reducing the central densities of dwarfs and low surface brightness galaxies in accord with observations. From a particle physics point of view, this points toward the existence of a 1-100 MeV particle in the dark sector that mediates self-interactions. Since mediator particles will generically couple to the Standard Model, direct detection experiments provide sensitive probes of self-interacting dark matter. We consider three minimal mechanisms for coupling the dark and visible sectors: photon kinetic mixing, Z boson mass mixing, and the Higgs portal. Self-interacting dark matter motivates a new benchmark paradigm for direct detection via momentum-dependent interactions, and ton-scale experiments will cover astrophysically motivated parameter regimes that are unconstrained by current limits. Direct detection is a complementary avenue to constrain velocity-dependent self-interactions that evade astrophysical bounds from larger scales, such as those from the bullet cluster.
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