Aachen T 2003 – wissenschaftliches Programm

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T: Teilchenphysik

T 404: Neue Ph
änomene IV

T 404.7: Vortrag

Mittwoch, 12. März 2003, 15:30–15:45, SFO3

CP violation in e⁺ e⁻ → χ_i⁰ χ_j⁰ — •O. Kittel¹, H. Fraas¹, and A. Bartl² — ¹Institut f"ur Theoretische Physik, Universit"at W"urzburg, D-97074 W"urzburg — ²Institut f"ur Theoretische Physik, Universit"at Wien, A-1090 Wien

We study CP-violating effects in production and subsequent decay of neutralinos at a linear collider with high luminosity and with longitudinal polarized electron and positron beams in the 500 GeV range. We propose a T-sensitive triple-product asymmetry for the two-body decay of one neutralino into a slepton-lepton pair to measure the CP-sensitive spin component of the neutralino. We work in the Minimal Supersymmetric Standard Model (MSSM) with complex parameters µ and M₁. In large regions of the MSSM parameter space, the CP-violating asymmetries reach 5-25 %.