Radiative corrections to co-annihilation processes
| dc.creator | Freitas, A. | |
| dc.date | 2007-05-28 | |
| dc.date | 2007-09-07 | |
| dc.date.accessioned | 2026-07-07T10:55:53Z | |
| dc.date.available | 2026-07-07T10:55:53Z | |
| dc.description | In co-annihilation scenarios, the weakly interacting dark matter particle (WIMP) is close in mass to another particle that can decay into the WIMP. As a result, both particles freeze out at roughly the same time in the early universe, and both contribute to the effective dark matter annihilation cross-section. Since the heavier particle does not need to be weakly interacting, the co-annihilation processes are in general subject to sizeable radiative corrections. Here this is analyzed for the example of neutralino-stop co-annihilation in supersymmetry. The leading QCD corrections are calculated and it is found that they have a large effect on the effective annihilation cross-section, reaching more than 50% in some regions of parameter space. | |
| dc.description | 8pp; version appearing in Phys. Lett. B | |
| dc.identifier | https://arxiv.org/abs/0705.4027 | |
| dc.identifier | http://arxiv.org/abs/0705.4027 | |
| dc.identifier | Phys.Lett.B652:280-284,2007 | |
| dc.identifier | doi:10.1016/j.physletb.2007.07.019 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/186228 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.subject | Astrophysics | |
| dc.title | Radiative corrections to co-annihilation processes | |
| dc.type | text |