Relic density of wino-like dark matter in the MSSM

  • M. Beneke
  • A. Bharucha
  • F. Dighera
  • C. Hellmann
  • A. Hryczuk
  • S. Recksiegel
  • P. Ruiz-Femenía
Open Access
Regular Article - Theoretical Physics

Abstract

The relic density of TeV-scale wino-like neutralino dark matter in the MSSM is subject to potentially large corrections as a result of the Sommerfeld effect. A recently developed framework enables us to calculate the Sommerfeld-enhanced relic density in general MSSM scenarios, properly treating mixed states and multiple co-annihilating channels as well as including off-diagonal contributions. Using this framework, including on-shell one-loop mass splittings and running couplings and taking into account the latest experimental constraints, we perform a thorough study of the regions of parameter space surrounding the well known pure-wino scenario: namely the effect of sfermion masses being non-decoupled and of allowing non-negligible Higgsino or bino components in the lightest neutralino. We further perform an investigation into the effect of thermal corrections and show that these can safely be neglected. The results reveal a number of phenomenologically interesting but so far unexplored regions where the Sommerfeld effect is sizeable. We find, in particular, that the relic density can agree with experiment for dominantly wino neutralino dark matter with masses ranging from 1.7 to beyond 4 TeV. In light of these results the bounds from Indirect Detection on wino-like dark matter should be revisited.

Keywords

Supersymmetry Phenomenology 

Notes

Open Access

This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.

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Copyright information

© The Author(s) 2016

Authors and Affiliations

  • M. Beneke
    • 1
  • A. Bharucha
    • 2
  • F. Dighera
    • 1
  • C. Hellmann
    • 1
  • A. Hryczuk
    • 1
    • 3
    • 4
  • S. Recksiegel
    • 1
  • P. Ruiz-Femenía
    • 1
  1. 1.Physik Department T31Technische Universität MünchenGarchingGermany
  2. 2.CPT, Aix-Marseille Université, Université de Toulon, CNRS, Case 907MarseilleFrance
  3. 3.National Centre for Nuclear ResearchWarsawPoland
  4. 4.Department of PhysicsUniversity of OsloOsloNorway

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