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T: Fachverband Teilchenphysik

T 15: Beyond the Standard Model (Theorie) I

T 15.10: Vortrag

Montag, 3. März 2008, 19:00–19:15, KGI-HS 1021

Tau polarisation as sensitive probe for CP violation in chargino production at the ILC — •Anja Marold — Physikalisches Institut der Universität Bonn

The Minimal Supersymmetric Standard Model offers additional sources for CP-violating phases. In the chargino sector, this is the phase of the Higgsino mass parameter µ.

We study chargino production e⁺e⁻→χ_i⁺χ_j⁻ with longitudinally polarised beams and the ensuing two-body decay of one of the charginos into a tau χ_i⁺→τ⁺ν_τ. We show that the transverse tau polarisation is highly sensitive to the phase of µ and define CP-asymmetries which probe the transverse tau-polarisation.

We present numerical results of the asymmetries which can be as large as 60% and discuss the importance of initial beam polarisations.