Baryonic Rare Decays of $Λ_b\to Λ\ell^+\ell^-$

Details Baryonic Rare Decays of $Λ_b\to Λ\ell^+\ell^-$ Baryonic Rare Decays of $Λ_b\to Λ\ell^+\ell^-$

2001-06-18

arxiv.org/abs/hep-ph/0106193v1

Phys.Rev. D64 (2001) 074001

Physics

High Energy Physics

High Energy Physics - Phenomenology

34 pages, 11 Figures, LaTex file, to be published in Phys.Rev.D

Scientific paper

10.1103/PhysRevD.64.074001

We present a systematic analysis for the rare baryonic exclusive decays of $\Lambda_b\to\Lambda l^+ l^- (l=e,\mu,\tau)$. We study the differential decay rates and the di-lepton forward-backward, lepton polarization and various CP asymmetries with a new simple set of form factors inspired by the heavy quark effective theory. We show that most of the observables are insensitive to the non-perturbative QCD effects. To illustrate the effect of new physics, we discuss our results in an explicit supersymmetric extension of the standard model, which contains new CP violating phases and therefore induces sizable CP violating asymmetries.

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