Probing New Physics in $B\to K^{(*)} \ell^+\ell^-$ decays

Details Probing New Physics in $B\to K^{(*)} \ell^+\ell^-$ decays Probing New Physics in $B\to K^{(*)} \ell^+\ell^-$ decays

2002-09-29

arxiv.org/abs/hep-ph/0209352v1

Phys.Rev. D66 (2002) 094018

Physics

High Energy Physics

High Energy Physics - Phenomenology

20 pages, 6 Figures, LaTex file

Scientific paper

10.1103/PhysRevD.66.094018

We study the exclusive decays of $B\to K^{(*)}\ell^+ \ell^-$ by the results in the perturbative QCD with the heavy quark effective theory and lattice calculations. We obtain the form factors for the $B\to K^{(*)}$ transitions in the whole allowed region. Our predictions on the branching ratios of $B\to K \ell^{+} \ell^{-}$, $B\to K^{*} e^{+}e^{-}$, and $B\to K^{*} \mu^{+} \mu^{-}$ are $0.53\pm 0.05 ^{+0.10}_{-0.07}$, $1.68\pm 0.17^{+0.14}_{-0.09}$, and $1.34\pm 0.13 ^{+0.11}_{-0.06}\times 10^{-6}$, where the errors are from the quark mixing elements and hadronic effects, respectively. We also find that our definitions of the T-odd observable and the up-down asymmetry of the $K$ meson in $B\to K^*\ell^+ \ell^-\to K\pi\ell^+ \ell^-$ can be used to probe new physics.

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