Increasing the Neutralino Relic Abundance with Slepton Coannihilations: Consequences for Indirect Dark Matter Detection

Simple item page
dc.creatorProfumo, Stefano
dc.creatorProvenza, Alessio
dc.date2006-09-28
dc.date2007-01-09
dc.date.accessioned2026-07-07T10:25:32Z
dc.date.available2026-07-07T10:25:32Z
dc.descriptionWe point out that if the lightest supersymmetric particle (LSP) is a Higgsino- or Wino-like neutralino, the net effect of coannihilations with sleptons is to increase the relic abundance, rather than producing the usual suppression, which takes place if the LSP is Bino-like. The reason for the enhancement lies in the effective thermally averaged cross section at freeze-out: sleptons annihilate (and co-annihilate) less efficiently than the neutralino(s)-chargino system, therefore slepton coannihilations effectively act as parasite degrees of freedom at freeze-out. Henceforth, the thermal relic abundance of LSP's corresponds to the cold Dark Matter abundance for smaller values of the LSP mass, and larger values of the neutralino pair annihilation cross section. In turn, at a given thermal neutralino relic abundance, this implies larger indirect detection rates, as a result of an increase in the fluxes of antimatter, gamma rays and neutrinos from the Sun orginating from neutralino pair annihilations.
dc.description16 pages, 6 figures, references added, typos corrected, matches with the published version
dc.identifierhttps://arxiv.org/abs/hep-ph/0609290
dc.identifierhttp://arxiv.org/abs/hep-ph/0609290
dc.identifierJCAP0612:019,2006
dc.identifierdoi:10.1088/1475-7516/2006/12/019
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/176572
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectAstrophysics
dc.titleIncreasing the Neutralino Relic Abundance with Slepton Coannihilations: Consequences for Indirect Dark Matter Detection
dc.typetext

Files

Collections

arXiv