A practical and consistent parametrization of dark matter self-interactions
A practical and consistent parametrization of dark matter self-interactions
复制标题
暗物质自相互作用的实用且一致的参数化
DOI:
10.1088/1475-7516/2020/06/043
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发表时间:
2020
影响因子:
6.4
通讯作者:
Murayama, Hitoshi
中科院分区:
文献类型:
--
作者:
Chu, Xiaoyong;Garcia-Cely, Camilo;Murayama, Hitoshi
Self-interacting dark matter has been proposed to explain the apparent mass deficit in astrophysical small-scale halos, while observations from galaxy clusters suggest that the corresponding cross section depends on the velocity. Accounting for this is often believed to be highly model-dependent with studies mostly focusing on scenarios with light mediators. Based on the effective-range formalism, in this work we point out a model-independent approach which accurately approximates the velocity dependence of the self-interaction cross section with only two parameters, in addition to the dark matter mass. We illustrate how this parameterization can be simultaneously interpreted in various well-motivated scenarios, including self-interactions induced by Yukawa forces, Breit-Wigner resonances and bound states. We investigate the astrophysical implications and discuss how the approximation can be improved in certain special regimes where it works poorly.
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DOI:
--
发表时间:
1982
期刊:
影响因子:
--
作者:
H. Haeringen;L. P. Kok
通讯作者:
L. P. Kok
影响因子:
6.4
作者:
B. Bonga;Suddhasattwa Brahma;A. Deutsch;S. Shandera
通讯作者:
S. Shandera
影响因子:
5.4
作者:
Sookyung Choi;Y. Hochberg;E. Kuflik;Hyun Min Lee;Y. Mambrini;H. Murayama;M. Pierre
通讯作者:
Sookyung Choi;Y. Hochberg;E. Kuflik;Hyun Min Lee;Y. Mambrini;H. Murayama;M. Pierre
DOI:
--
发表时间:
1965
期刊:
影响因子:
--
作者:
R. O. Berger;L. Spruch
通讯作者:
L. Spruch
DOI:
--
发表时间:
1972
期刊:
影响因子:
--
作者:
H. Noyes
通讯作者:
H. Noyes