Lepton asymmetries in exclusive $b \to s\ell^+\ell^-$ decays as a test of the Standard Model

Details Lepton asymmetries in exclusive $b \to s\ell^+\ell^-$ decays as a test of the Standard Model Lepton asymmetries in exclusive $b \to s\ell^+\ell^-$ decays as a test of the Standard Model

1998-03-13

arxiv.org/abs/hep-ph/9803343v1

Phys.Lett. B430 (1998) 332-340

Physics

High Energy Physics

High Energy Physics - Phenomenology

revtex, 9 pages, 5 figures

Scientific paper

10.1016/S0370-2693(98)00524-3

We argue that the longitudinal lepton polarization and the forward-backward asymmetries in exclusive $B\to (K,K^*)\ell^+\ell^-$ decays are largely unaffected by the theoretical uncertainties in the long-distance contributions both induced by the long-range charming penguins in the $\ell^+\ell^-$ channel and those in the meson channels encoded in the meson transition form factors, and are mainly determined by the short-distance Wilson coefficients at the low-energy scale $\mu\simeq m_b$. Thus, the above mentioned asymmetries provide a powerful probe of the Standard Model and its extensions.

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