Sommerfeld enhancement for puffy self-interacting dark matter

被引:1
作者
Wang, Wenyu [1 ]
Xu, Wu-Long [1 ]
Yang, Jin Min [2 ,3 ]
Zhu, Bin [4 ]
Zhu, Rui [2 ,3 ]
机构
[1] Beijing Univ Technol, Sch Phys & Optoelect Engn, Beijing 100124, Peoples R China
[2] Chinese Acad Sci, CAS Key Lab Theoret Phys, Inst Theoret Phys, Beijing 100190, Peoples R China
[3] Univ Chinese Acad Sci, Sch Phys, Beijing 100049, Peoples R China
[4] Yantai Univ, Dept Phys, Yantai 264005, Peoples R China
关键词
Cosmology of Theories BSM; Particle Nature of Dark Matter; ABUNDANCE;
D O I
10.1007/JHEP01(2024)114
中图分类号
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号
摘要
We examine the Sommerfeld enhancement effect for the puffy self-interacting dark matter. We find out two new parameters to classify the self-scattering cross section into the Born, the resonance and the classical regimes for the puffy dark matter. Then we observe that the resonance peaks for the puffy dark matter self-scattering and for the Sommerfeld enhancement effect have the same locations. Further, we find that for a large ratio between R chi (radius of a puffy dark matter particle) and 1/m phi (force range), the Sommerfeld enhancement factor approaches to 1 (no enhancement). Finally, for the puffy SIDM scenario to solve the small-scale problems, the values of the Sommerfeld enhancement factor are displayed in the allowed parameter regions.
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页数:17
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