A monte carlo study of the rare decay $B \to X_s \ell^+ \ell^-$

Details A monte carlo study of the rare decay $B \to X_s \ell^+ \ell^-$ A monte carlo study of the rare decay $B \to X_s \ell^+ \ell^-$

1998-09-24

arxiv.org/abs/hep-ph/9809515v1

Phys.Rev. D59 (1999) 097501

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, 6 figures

Scientific paper

10.1103/PhysRevD.59.097501

We study, using a monte carlo approach, the rare decay $B\to X_s \ell^+ \ell^-$ including effects of the arbitrariness of the phase between the $\psi$ amplitudes and the perturbative amplitude, $b$-quark fermi motion inside the $B$ meson, and experimental smearing of lepton momenta. The fermi motion of $b$-quark inside the $B$ meson is modeled by the ACCMM model. We found that such effects reduce the sensitivities of the spectra of invariant mass and forward-backward asymmetry of the lepton pair to new physics; especially, in the neighborhood of the $\psi$ resonances. We also estimate the sensitivity range of Wilson coefficients with respect to the uncertainties.

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