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Linear sigma dark matter
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DOI：10.1007/JHEP09(2022)041.png)
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Abstract
En 中文
We present a model of self-interacting dark matter based on QCD-like theories and inspired by the proximity of a(0)(980 +/- 20) to the K (K) over bar (990) threshold. Dark matter is comprised of dark pions which self-scatter via the sigma resonance close to the pi pi threshold. While the linear sigma model serves as a qualitative guide, a fully unitary description of the scattering in the strongly coupled regime is given by effective range theory. The introduction of a kinetically mixed dark photon allows the dark pion to either freeze-out or -in. We study the viable parameter space which explains the observed relic abundance while evading all current constraints. Searches for dark matter self interactions at different scales, (in)direct detection signals, and (in)visibly-decaying dark photons will test this model in the near future.
Keywords:
Effective Field Theories of QCD
Particle Nature of Dark Matter
Sigma Models
Journal
IF:
5.5
Papers:
3.9W
Citations:
13.7W