Complete Anatomy of B -> K*ll and its angular distribution

Abstract

We present a complete and optimal set of observables for the exclusive 4-body B meson decay B -> K*(->K pi) l+l- in the low dilepton mass region, that contains a maximal number of clean observables. This basis of observables is built in a systematic way. We show that all the previously defined observables and any observable that one can construct, can be expressed as a function of this basis. This set of observables contains all the information that can be extracted from the angular distribution in the cleanest possible way. We provide explicit expressions for the full and the uniangular distributions in terms of this basis. The conclusions presented here can be easily extended to the large-q^2 region. We study the sensitivity of the observables to right-handed currents and scalars. Finally, we present for the first time all the symmetries of the full distribution including massive terms and scalar contributions.

37 pages, 12 Figures. Corrected typo in Eqs. (29) and (44). Results and conclusions unchanged

References in corpus (7)

• Measurement of the Differential Branching Fraction and Forward-Backword Asymmetry for B->K(*)l+l-
• NNLO QCD corrections to the B -> X_s gamma matrix elements using interpolation in m_c
• Measurements of the Angular Distributions in the Decays B -> K(*) mu+ mu- at CDF
• New observables in the decay mode anti-B --> anti-K*0 l+ l-
• Model-independent constraints on new physics in b --> s transitions
• New physics reach of the decay mode $\bar{B}\to {\bar{K}}^{\ast 0}{\ell }^{+}{\ell }^{-}$
• An improved observable for the forward-backward asymmetry in B -> K* l+ l- and Bs -> phi l+ l-

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