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New Contributions to Neutralino Elastic Cross-sections from CP Violating Phases in the MSSM

Toby Falk·Andrew Ferstl·Keith A. Olive
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Abstract

We compute the four-Fermi neutralino-quark interaction Lagrangian including contributions from the CP violating phases in the MSSM. We find that neutralino-nucleus scattering cross-sections relevant for direct detection experiments show a strong dependence on the value of the CP-violating phase associated with the $μ$ parameter, $θ_μ$. In some cases, for a broad range of non-zero $θ_μ$, there are cancellations in the cross-sections which reduce the cross-section by more than an order of magnitude. In other cases, there may be enhancements as one varies $θ_μ$.

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Toby Falk, Andrew Ferstl, Keith A. Olive. 1999-10-18. New Contributions to Neutralino Elastic Cross-sections from CP Violating Phases in the MSSM. https://doi.org/10.1103/physrevd.59.055009%2010.1103%2Fphysrevd.60.119904

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