We reconsider non-thermal production of WIMP dark matter in a systematic way and using a numerical code for accurate computations of dark matter relic densities. Candidates with large pair annihilation rates are favored, suggesting a connection with the anomalies in the lepton cosmic-ray flux detected by Pamela and Fermi. Focussing on supersymmetric models we will consider the impact of non-thermal production on the preferred mass scale for dark matter neutralinos. We have also developed a new formalism to solve the Boltzmann equation for a system of coannihilating species without assuming kinetic equilibrium and applied it to the case of pure Winos.

Aspects of production and kinetic decoupling of non-thermal dark matter / Arcadi, G; Ullio, Piero. - In: JOURNAL OF PHYSICS. CONFERENCE SERIES. - ISSN 1742-6588. - 375(2012), pp. 012044.1-012044.4. ((Intervento presentato al convegno 12th International Conference on Topics in Astroparticle and Underground Physics, TAUP 2011 tenutosi a Munich nel September 2011 [10.1088/1742-6596/375/1/012044].

Aspects of production and kinetic decoupling of non-thermal dark matter

Ullio, Piero
2012

Abstract

We reconsider non-thermal production of WIMP dark matter in a systematic way and using a numerical code for accurate computations of dark matter relic densities. Candidates with large pair annihilation rates are favored, suggesting a connection with the anomalies in the lepton cosmic-ray flux detected by Pamela and Fermi. Focussing on supersymmetric models we will consider the impact of non-thermal production on the preferred mass scale for dark matter neutralinos. We have also developed a new formalism to solve the Boltzmann equation for a system of coannihilating species without assuming kinetic equilibrium and applied it to the case of pure Winos.
375
1
4
https://arxiv.org/abs/1111.6532
IOP Publishing
Arcadi, G; Ullio, Piero
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/20.500.11767/15360
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