Lepton asymmetries in heavy baryon decays of Lambda(b)->Lambda l(+)l(-)

[[abstract]]We study the dilepton forward-backward and the longitudinal, normal and transverse lepton polarization asymmetries in the heavy baryon decays of Lambda (b) --> Lambdal(+)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 Lambda (b) --> Lambda mu (+)mu (-) and -0.04 (-0.03) and (10.9, -10.0, -0.39)% ((10.9, -0.2, -0.34)%) for Lambda (b) --> Lambda tau (+)tau (-) respectively.[[fileno]]2010129010057[[department]]物理