/ 01 01 20 1 v 2 1 9 M ar 2 00 1 Lepton Asymmetries in Heavy Baryon Decays of Λ b → Λ l + l −

Abstract

We study the dilepton forward-backward and the longitudinal, normal and transverse lepton polarization asymmetries in the heavy baryon decays of Λb → Λll. We show that the asymmetries have a less dependence on the non-perturbative QCD effects. In the standard model, we find that the integrated forward-backward asymmetries (FBAs) and three components of the polarizations in the QCD sum rule approach (pole model) are −0.13 (−0.12) and (58.3,−9.4,−0.07)% ((58.3,−12.6,−0.07)%) for Λb → Λμμ and −0.04 (−0.03) and (10.9,−10.0,−0.39)% ((10.9,−0.2,−0.34)%) for Λb → Λττ, respectively.

Cite this paper

@inproceedings{ll200100, title={/ 01 01 20 1 v 2 1 9 M ar 2 00 1 Lepton Asymmetries in Heavy Baryon Decays of Λ b → Λ l + l −}, author={→ Λll and Chuan-Hung Chen and Chao-Qiang Geng}, year={2001} }