Upper Bounds on Asymmetric Dark Matter Self Annihilation Cross Sections

Дата и время публикации : 2012-05-03T11:05:00Z

Авторы публикации и институты :
Ulrich Ellwanger
Pantelis Mitropoulos

Ссылка на журнал-издание: Ссылка на журнал-издание не найдена
Коментарии к cтатье: 13 pages, 3 Figures, Reference added, improved notation
Первичная категория: hep-ph

Все категории : hep-ph, astro-ph.HE

Краткий обзор статьи: Most models for asymmetric dark matter allow for dark matter self annihilation processes, which can wash out the asymmetry at temperatures near and below the dark matter mass. We study the coupled set of Boltzmann equations for the symmetric and antisymmetric dark matter number densities, and derive conditions applicable to a large class of models for the absence of a significant wash-out of an asymmetry. These constraints are applied to various existing scenarios. In the case of left- or right-handed sneutrinos, very large electroweak gaugino masses, or very small mixing angles are required.

Category: Physics