Cross Section Calculations in Theories of Self-Interacting Dark Matter
| Title: | Cross Section Calculations in Theories of Self-Interacting Dark Matter |
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| Authors: | Girmohanta, Sudhakantha, Shrock, Robert |
| Source: | Phys. Rev. D 106, 063013 (2022) |
| Publication Year: | 2022 |
| Collection: | Astrophysics High Energy Physics - Experiment High Energy Physics - Phenomenology High Energy Physics - Theory |
| Subject Terms: | High Energy Physics - Phenomenology, Astrophysics - Cosmology and Nongalactic Astrophysics, Astrophysics - Astrophysics of Galaxies, High Energy Physics - Experiment, High Energy Physics - Theory |
| More Details: | We study an asymmetric dark matter model with self-interacting dark matter consisting of a Dirac fermion $\chi$ coupled to a scalar or vector mediator, such that the reaction $\chi + \chi \to \chi + \chi$ is well described by perturbation theory. We compute the scattering cross section $\sigma$, the transfer cross section $\sigma_T$, and the viscosity cross section $\sigma_V$ for this reaction. As one part of our study, we give analytic and numerical comparisons of results obtained with the inclusion of both $t$-channel and $u$-channel exchanges and results obtained in an approximation that has often been used in the literature that includes only the $t$-channel contribution. The velocity dependences of these cross sections are studied in detail and shown to be in accord with observational data. Comment: 15 pages, 10 figures |
| Document Type: | Working Paper |
| DOI: | 10.1103/PhysRevD.106.063013 |
| Access URL: | http://arxiv.org/abs/2206.14395 |
| Accession Number: | edsarx.2206.14395 |
| Database: | arXiv |
| DOI: | 10.1103/PhysRevD.106.063013 |
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