Direct Detection of the Wino- and Higgsino-like Neutralino Dark Matters at One-Loop Level

Details Direct Detection of the Wino- and Higgsino-like Neutralino Dark Matters at One-Loop Level Direct Detection of the Wino- and Higgsino-like Neutralino Dark Matters at One-Loop Level

2004-07-15

arxiv.org/abs/hep-ph/0407168v2

Phys.Rev. D71 (2005) 015007

Physics

High Energy Physics

High Energy Physics - Phenomenology

26 pages, 9 figures. Version to be published in Physical Review D

Scientific paper

10.1103/PhysRevD.71.015007

The neutralino-nucleon (\tilde{\chi}^0-N) scattering is an important process for direct dark matter searches. In this paper we discuss one-loop contributions to the cross section in the wino-like and Higgsino-like LSP cases. The neutralino-nucleon scattering mediated by the Higgs \tilde{\chi}^0\tilde{\chi}^0 and Z\tilde{\chi}^0\tilde{\chi}^0 couplings at tree level is suppressed by the gaugino-Higgsino mixing at tree level when the neutralino is close to a weak eigenstate. The one-loop contribution to the cross section, generated by the gauge interaction, is not suppressed by any SUSY particle mass or mixing in the wino- and Higgsino-like LSP cases. It may significantly alter the total cross section when \sigma_{\tilde{\chi}^0 N}\sim 10^{-45} cm^2 or less.

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