Bound states of pseudo-Dirac dark matter
© 2019 IOP Publishing Ltd and Sissa Medialab. We study the bound-state spectrum in a simple model of pseudo-Dirac dark matter, and examine how the rate of bound-state formation through radiative capture compares to Sommerfeld-enhanced annihilation. We use this model as an example to delineate the ne...
| Main Authors: | , |
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| Other Authors: | |
| Format: | Article |
| Language: | English |
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IOP Publishing
2021
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| Online Access: | https://hdl.handle.net/1721.1/135039 |
| _version_ | 1811088481906065408 |
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| author | Bhattacharya, Arindam Slatyer, Tracy R |
| author2 | Massachusetts Institute of Technology. Center for Theoretical Physics |
| author_facet | Massachusetts Institute of Technology. Center for Theoretical Physics Bhattacharya, Arindam Slatyer, Tracy R |
| author_sort | Bhattacharya, Arindam |
| collection | MIT |
| description | © 2019 IOP Publishing Ltd and Sissa Medialab. We study the bound-state spectrum in a simple model of pseudo-Dirac dark matter, and examine how the rate of bound-state formation through radiative capture compares to Sommerfeld-enhanced annihilation. We use this model as an example to delineate the new features induced by the presence of a mass splitting between the dark matter and a nearly-degenerate partner, compared to the case where only a single dark-matter-like state is present. We provide a simple analytic prescription for estimating the spectrum of bound states in systems containing a mass splitting, which in turn allows characterization of the resonances due to near-zero-energy bound states, and validate this estimate both for pseudo-Dirac dark matter and for the more complex case of wino dark matter. We demonstrate that for pseudo-Dirac dark matter the capture rate into deeply bound states is, to a good approximation, simply related to the Sommerfeld enhancement factor. |
| first_indexed | 2024-09-23T14:02:50Z |
| format | Article |
| id | mit-1721.1/135039 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T14:02:50Z |
| publishDate | 2021 |
| publisher | IOP Publishing |
| record_format | dspace |
| spelling | mit-1721.1/1350392023-09-12T20:22:13Z Bound states of pseudo-Dirac dark matter Bhattacharya, Arindam Slatyer, Tracy R Massachusetts Institute of Technology. Center for Theoretical Physics Massachusetts Institute of Technology. Department of Physics © 2019 IOP Publishing Ltd and Sissa Medialab. We study the bound-state spectrum in a simple model of pseudo-Dirac dark matter, and examine how the rate of bound-state formation through radiative capture compares to Sommerfeld-enhanced annihilation. We use this model as an example to delineate the new features induced by the presence of a mass splitting between the dark matter and a nearly-degenerate partner, compared to the case where only a single dark-matter-like state is present. We provide a simple analytic prescription for estimating the spectrum of bound states in systems containing a mass splitting, which in turn allows characterization of the resonances due to near-zero-energy bound states, and validate this estimate both for pseudo-Dirac dark matter and for the more complex case of wino dark matter. We demonstrate that for pseudo-Dirac dark matter the capture rate into deeply bound states is, to a good approximation, simply related to the Sommerfeld enhancement factor. 2021-10-27T20:10:27Z 2021-10-27T20:10:27Z 2019 2019-06-05T12:18:36Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/135039 en 10.1088/1475-7516/2019/03/029 Journal of Cosmology and Astroparticle Physics Creative Commons Attribution-Noncommercial-Share Alike http://creativecommons.org/licenses/by-nc-sa/4.0/ application/pdf IOP Publishing arXiv |
| spellingShingle | Bhattacharya, Arindam Slatyer, Tracy R Bound states of pseudo-Dirac dark matter |
| title | Bound states of pseudo-Dirac dark matter |
| title_full | Bound states of pseudo-Dirac dark matter |
| title_fullStr | Bound states of pseudo-Dirac dark matter |
| title_full_unstemmed | Bound states of pseudo-Dirac dark matter |
| title_short | Bound states of pseudo-Dirac dark matter |
| title_sort | bound states of pseudo dirac dark matter |
| url | https://hdl.handle.net/1721.1/135039 |
| work_keys_str_mv | AT bhattacharyaarindam boundstatesofpseudodiracdarkmatter AT slatyertracyr boundstatesofpseudodiracdarkmatter |