Karlsruhe 2011 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 14: Flavourphysik (Theorie) I

T 14.1: Vortrag

Donnerstag, 31. März 2011, 16:45–17:00, 30.23: 3-1

B→ Kℓ⁺ℓ⁻ at Low Hadronic Recoil — Gudrun Hiller, Danny van Dyk, and •Christian Wacker — Institut für Physik, Technische Universität Dortmund, D-44221 Dortmund, Germany

Within the heavy quark effective theory framework it is shown, that the amplitude for the rare B decay B→ Kℓ⁺ℓ⁻ at low hadronic recoil has the identical structure as the amplitude for the decay B→ K^*ℓ⁺ℓ⁻ in the same kinematics region. This correspondence of short distance couplings allows us to check and improve the constraints on the Wilson coefficients, by analyzing the experimental data for the decay B→ Kℓ⁺ℓ⁻.