Real scalar dark matter: relativistic treatment
Abstract A stable real scalar provides one of the simplest possibilities to account for dark matter. We consider the regime where its coupling to the Standard Model fields is negligibly small. Due to self-coupling, the scalar field can reach thermal or at least kinetic equilibrium, in which case the...
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doaj-4775a5205a1b4c81b3b24ceeaae228872020-11-25T04:02:11ZengSpringerOpenJournal of High Energy Physics1029-84792019-08-012019812610.1007/JHEP08(2019)050Real scalar dark matter: relativistic treatmentGiorgio Arcadi0Oleg Lebedev1Stefan Pokorski2Takashi Toma3Max-Planck-Institut fur KernphysikDepartment of Physics, University of HelsinkiInstitute of Theoretical Physics, Faculty of Physics, University of WarsawDepartment of Physics, McGill UniversityAbstract A stable real scalar provides one of the simplest possibilities to account for dark matter. We consider the regime where its coupling to the Standard Model fields is negligibly small. Due to self-coupling, the scalar field can reach thermal or at least kinetic equilibrium, in which case the system is characterized by its temperature and effective chemical potential. We perform a fully relativistic analysis of dark matter evolution, thermalization conditions and different freeze-out regimes, including the chemical potential effects. To this end, we derive a relativistic Bose-Einstein analog of the Gelmini-Gondolo formula for a thermal averaged cross section. Finally, we perform a comprehensive parameter space analysis to determine regions consistent with observational constraints. Dark matter can be both warm and cold in this model.http://link.springer.com/article/10.1007/JHEP08(2019)050Beyond Standard ModelCosmology of Theories beyond the SM |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Giorgio Arcadi Oleg Lebedev Stefan Pokorski Takashi Toma |
spellingShingle |
Giorgio Arcadi Oleg Lebedev Stefan Pokorski Takashi Toma Real scalar dark matter: relativistic treatment Journal of High Energy Physics Beyond Standard Model Cosmology of Theories beyond the SM |
author_facet |
Giorgio Arcadi Oleg Lebedev Stefan Pokorski Takashi Toma |
author_sort |
Giorgio Arcadi |
title |
Real scalar dark matter: relativistic treatment |
title_short |
Real scalar dark matter: relativistic treatment |
title_full |
Real scalar dark matter: relativistic treatment |
title_fullStr |
Real scalar dark matter: relativistic treatment |
title_full_unstemmed |
Real scalar dark matter: relativistic treatment |
title_sort |
real scalar dark matter: relativistic treatment |
publisher |
SpringerOpen |
series |
Journal of High Energy Physics |
issn |
1029-8479 |
publishDate |
2019-08-01 |
description |
Abstract A stable real scalar provides one of the simplest possibilities to account for dark matter. We consider the regime where its coupling to the Standard Model fields is negligibly small. Due to self-coupling, the scalar field can reach thermal or at least kinetic equilibrium, in which case the system is characterized by its temperature and effective chemical potential. We perform a fully relativistic analysis of dark matter evolution, thermalization conditions and different freeze-out regimes, including the chemical potential effects. To this end, we derive a relativistic Bose-Einstein analog of the Gelmini-Gondolo formula for a thermal averaged cross section. Finally, we perform a comprehensive parameter space analysis to determine regions consistent with observational constraints. Dark matter can be both warm and cold in this model. |
topic |
Beyond Standard Model Cosmology of Theories beyond the SM |
url |
http://link.springer.com/article/10.1007/JHEP08(2019)050 |
work_keys_str_mv |
AT giorgioarcadi realscalardarkmatterrelativistictreatment AT oleglebedev realscalardarkmatterrelativistictreatment AT stefanpokorski realscalardarkmatterrelativistictreatment AT takashitoma realscalardarkmatterrelativistictreatment |
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1724444061818945536 |