CP-Violating Effects in Neutralino Scattering and Annihilation

Details CP-Violating Effects in Neutralino Scattering and Annihilation CP-Violating Effects in Neutralino Scattering and Annihilation

1999-08-17

arxiv.org/abs/hep-ph/9908390v1

JHEP 0207 (2002) 052

Physics

High Energy Physics

High Energy Physics - Phenomenology

30 pages, 11 figures

Scientific paper

10.1088/1126-6708/2002/07/052

We show that in some regions of supersymmetric parameter space, CP violating effects that mix the CP-even and CP-odd Higgs bosons can enhance the neutralino annihilation rate, and hence the indirect detection rate of neutralino dark matter, by factors of 10^6. The same CP violating effects can reduce the neutralino scattering rate off nucleons, and hence the direct detection rate of neutralino dark matter, by factors of 10^{-7}. We study the dependence of these effects on the phase of the trilinear coupling A, and find cases in the region being probed by dark matter searches which are experimentally excluded when CP is conserved but are allowed when CP is violated.

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