Relic density of neutralino dark matter in the MSSM with CP violation

G. Bélanger, F. Boudjema, S. Kraml, A. Pukhov, and A. Semenov
Phys. Rev. D 73, 115007 – Published 16 June 2006

Abstract

We calculate the relic density of dark matter in the MSSM with CP violation. We analyze various scenarios of neutralino annihilation: the cases of a b-ino, b-ino–W-ino and b-ino–Higgsino LSP, annihilation through Higgs, as well as sfermion coannihilation scenarios. Large phase effects are found—on the one hand, due to shifts in the masses; on the other hand, due to modifications of the couplings. Taking special care to disentangle the effects in masses and couplings, we demonstrate that the presence of CP phases can have a significant influence on the neutralino relic abundance. Typical variations in Ωh2 solely from modifications in the couplings are O (10%–100%), but can reach an order of magnitude in some cases.

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  • Received 28 April 2006

DOI:https://doi.org/10.1103/PhysRevD.73.115007

©2006 American Physical Society

Authors & Affiliations

G. Bélanger1, F. Boudjema1, S. Kraml2, A. Pukhov3, and A. Semenov4

  • 1LAPTH, 9 Chemin de Bellevue, B.P. 110, F-74941 Annecy-le-Vieux, France
  • 2CERN, Department of Physics, Theory Division, CH-1211 Geneva 23, Switzerland
  • 3Skobeltsyn Institute of Nuclear Physics, Moscow State University, Moscow 119992, Russia
  • 4Joint Institute for Nuclear Research (JINR), 141980, Dubna, Russia

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Issue

Vol. 73, Iss. 11 — 1 June 2006

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