CP-Violating Effects in Neutralino Scattering and Annihilation | Zendy

Paolo Gondolo | Zendy; Katherine Freese | Zendy

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CP-Violating Effects in Neutralino Scattering and Annihilation

Author(s) -

Paolo Gondolo,

Katherine Freese

Publication year - 2002

Publication title -

journal of high energy physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.998

H-Index - 261

eISSN - 1126-6708

pISSN - 1029-8479

DOI - 10.1088/1126-6708/2002/07/052

Subject(s) - neutralino , physics , particle physics , dark matter , annihilation , higgs boson , parameter space , minimal supersymmetric standard model , coupling (piping) , supersymmetry , nuclear physics , statistics , mathematics , mechanical engineering , engineering

We show that in some regions of supersymmetric parameter space, CP violatingeffects that mix the CP-even and CP-odd Higgs bosons can enhance the neutralinoannihilation rate, and hence the indirect detection rate of neutralino darkmatter, by factors of 10^6. The same CP violating effects can reduce theneutralino scattering rate off nucleons, and hence the direct detection rate ofneutralino dark matter, by factors of 10^{-7}. We study the dependence of theseeffects on the phase of the trilinear coupling A, and find cases in the regionbeing probed by dark matter searches which are experimentally excluded when CPis conserved but are allowed when CP is violated.Comment: 30 pages, 11 figure

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