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

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

1998-06-18

arxiv.org/abs/hep-ph/9806413v4

Phys.Rev.D59:055009,1999; Erratum-ibid.D60:119904,1999

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages in LaTeX, 5 eps figures; corrected error in spin-independent cross-section, figures modified, conclusions unchanged

Scientific paper

10.1103/PhysRevD.59.055009

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 $\mu$ parameter, $\theta_\mu$. In some cases, for a broad range of non-zero $\theta_\mu$, 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 $\theta_\mu$.

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