Impeded Dark Matter
We consider dark matter models in which the mass splitting between the dark matter particles and their annihilation products is tiny. Compared to the previously proposed Forbidden Dark Matter scenario, the mass splittings we consider are much smaller, and are allowed to be either positive or negativ...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | English |
| Published: |
Springer Berlin Heidelberg
2016
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| Online Access: | http://hdl.handle.net/1721.1/105818 https://orcid.org/0000-0001-9699-9047 https://orcid.org/0000-0002-6809-7545 |
| _version_ | 1826216567656939520 |
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| author | Kopp, Joachim Liu, Jia Wang, Xiao-Ping Slatyer, Tracy Robyn Xue, Wei |
| author2 | Massachusetts Institute of Technology. Center for Theoretical Physics |
| author_facet | Massachusetts Institute of Technology. Center for Theoretical Physics Kopp, Joachim Liu, Jia Wang, Xiao-Ping Slatyer, Tracy Robyn Xue, Wei |
| author_sort | Kopp, Joachim |
| collection | MIT |
| description | We consider dark matter models in which the mass splitting between the dark matter particles and their annihilation products is tiny. Compared to the previously proposed Forbidden Dark Matter scenario, the mass splittings we consider are much smaller, and are allowed to be either positive or negative. To emphasize this modification, we dub our scenario “Impeded Dark Matter”. We demonstrate that Impeded Dark Matter can be easily realized without requiring tuning of model parameters. For negative mass splitting, we demonstrate that the annihilation cross-section for Impeded Dark Matter depends linearly on the dark matter velocity or may even be kinematically forbidden, making this scenario almost insensitive to constraints from the cosmic microwave background and from observations of dwarf galaxies. Accordingly, it may be possible for Impeded Dark Matter to yield observable signals in clusters or the Galactic center, with no corresponding signal in dwarfs. For positive mass splitting, we show that the annihilation cross-section is suppressed by the small mass splitting, which helps light dark matter to survive increasingly stringent constraints from indirect searches. As specific realizations for Impeded Dark Matter, we introduce a model of vector dark matter from a hidden SU(2) sector, and a composite dark matter scenario based on a QCD-like dark sector. |
| first_indexed | 2024-09-23T16:49:21Z |
| format | Article |
| id | mit-1721.1/105818 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T16:49:21Z |
| publishDate | 2016 |
| publisher | Springer Berlin Heidelberg |
| record_format | dspace |
| spelling | mit-1721.1/1058182022-10-03T08:34:08Z Impeded Dark Matter Kopp, Joachim Liu, Jia Wang, Xiao-Ping Slatyer, Tracy Robyn Xue, Wei Massachusetts Institute of Technology. Center for Theoretical Physics Massachusetts Institute of Technology. Department of Physics Slatyer, Tracy Robyn Xue, Wei We consider dark matter models in which the mass splitting between the dark matter particles and their annihilation products is tiny. Compared to the previously proposed Forbidden Dark Matter scenario, the mass splittings we consider are much smaller, and are allowed to be either positive or negative. To emphasize this modification, we dub our scenario “Impeded Dark Matter”. We demonstrate that Impeded Dark Matter can be easily realized without requiring tuning of model parameters. For negative mass splitting, we demonstrate that the annihilation cross-section for Impeded Dark Matter depends linearly on the dark matter velocity or may even be kinematically forbidden, making this scenario almost insensitive to constraints from the cosmic microwave background and from observations of dwarf galaxies. Accordingly, it may be possible for Impeded Dark Matter to yield observable signals in clusters or the Galactic center, with no corresponding signal in dwarfs. For positive mass splitting, we show that the annihilation cross-section is suppressed by the small mass splitting, which helps light dark matter to survive increasingly stringent constraints from indirect searches. As specific realizations for Impeded Dark Matter, we introduce a model of vector dark matter from a hidden SU(2) sector, and a composite dark matter scenario based on a QCD-like dark sector. United States. Dept. of Energy (Contracts DE−SC00012567 and DE−SC0013999) 2016-12-14T19:45:04Z 2016-12-14T19:45:04Z 2016-12 2016-11 2016-12-14T05:10:49Z Article http://purl.org/eprint/type/JournalArticle 1029-8479 http://hdl.handle.net/1721.1/105818 Kopp, Joachim et al. “Impeded Dark Matter.” Journal of High Energy Physics 2016.12 (2016): n. pag. https://orcid.org/0000-0001-9699-9047 https://orcid.org/0000-0002-6809-7545 en http://dx.doi.org/10.1007/JHEP12(2016)033 Journal of High Energy Physics Creative Commons Attribution http://creativecommons.org/licenses/by/4.0/ The Author(s) application/pdf Springer Berlin Heidelberg Springer Berlin Heidelberg |
| spellingShingle | Kopp, Joachim Liu, Jia Wang, Xiao-Ping Slatyer, Tracy Robyn Xue, Wei Impeded Dark Matter |
| title | Impeded Dark Matter |
| title_full | Impeded Dark Matter |
| title_fullStr | Impeded Dark Matter |
| title_full_unstemmed | Impeded Dark Matter |
| title_short | Impeded Dark Matter |
| title_sort | impeded dark matter |
| url | http://hdl.handle.net/1721.1/105818 https://orcid.org/0000-0001-9699-9047 https://orcid.org/0000-0002-6809-7545 |
| work_keys_str_mv | AT koppjoachim impededdarkmatter AT liujia impededdarkmatter AT wangxiaoping impededdarkmatter AT slatyertracyrobyn impededdarkmatter AT xuewei impededdarkmatter |