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Baryonic Rare Decays of $\Lambda_b\to \Lambda \ell^+\ell^-$
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abstract
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.
Forward citations
Cited by 2 Pith papers
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Study of Form Factors and Observables in $B_c^- \rightarrow \bar{D}^{(*)0}\ell^-\bar{\nu}_{\ell}$ and $B_c^- \rightarrow D^{(*)-}\ell^+\ell^-$ decays
Computes pQCD form factors for B_c to D(*) transitions via lattice inputs and heavy quark symmetry, then predicts branching fractions and angular observables for semileptonic and rare dilepton decays.
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Investigation of $\Lambda_c \to (\Lambda,n)\ell^+ \nu_\ell $ Decays in Standard Model and Beyond
A model-independent analysis of Lambda_c to (Lambda, neutron) l nu decays finds SM rates about 10 percent above experiment and proposes the muon-to-electron forward-backward asymmetry ratio as a robust new physics probe.
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