TY - JOUR
T1 - Lepton asymmetries in heavy baryon decays of Λb → Λl+l-
AU - Chen, Chuan Hung
AU - Geng, C. Q.
N1 - Funding Information:
This work was supported in part by the National Science Council of the Republic of China under contract numbers NSC-89-2112-M-007-054 and NSC-89-2112-M-006-033.
PY - 2001/9/20
Y1 - 2001/9/20
N2 - We study the dilepton forward-backward and the longitudinal, normal and transverse lepton polarization asymmetries in the heavy baryon decays of Λb → Λl+l-. We show that the asymmetries have a less dependence on the nonperturbative 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 → Λμ+μ- and -0.04 (-0.03) and (10.9, -10.0, -0.39)% ((10.9, -0.2, -0.34)%) for Λb → Λτ+τ-, respectively.
AB - We study the dilepton forward-backward and the longitudinal, normal and transverse lepton polarization asymmetries in the heavy baryon decays of Λb → Λl+l-. We show that the asymmetries have a less dependence on the nonperturbative 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 → Λμ+μ- and -0.04 (-0.03) and (10.9, -10.0, -0.39)% ((10.9, -0.2, -0.34)%) for Λb → Λτ+τ-, respectively.
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U2 - 10.1016/S0370-2693(01)00937-6
DO - 10.1016/S0370-2693(01)00937-6
M3 - Article
AN - SCOPUS:0035922390
SN - 0370-2693
VL - 516
SP - 327
EP - 336
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
IS - 3-4
ER -