Heidelberg 2007 – scientific programme

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T: Fachverband Teilchenphysik

T 506: Flavour Theorie II

T 506.6: Talk

Friday, March 9, 2007, 15:15–15:30, KIP SR 2.401

Rare Decay Constraints on the Non-standard Z-penguin — •Giorgi Piranishvili — Dortmund University, Germany

We study general constraints on a flavor changing bsZ interactions from the rare decays B→ X_sl⁺l⁻, B→ K(K^*)l⁺l⁻. The present experimental data give a possibility to extract the information on the contribution of the Z penguin diagram to the processes above. We find that the allowed parameter space of Z-coupling can induce a significant deviation from the SM contribution in the different rare decay branching ratios (B→µ⁺µ⁻, B→ K^*νν) which could be seen in future. We analyze also the various observables CP asymmetries in B→ K^*(Kπ)l⁺l⁻ in the presence of an additional CP-phase in the bsZ vertex.