1202.5444 (T. M. Aliev et al.)

Lepton polarization effects in "Lambda_b -> Lambda l+l-" decay in family
non-universal Z' model    [PDF]

T. M. Aliev, M. Savci

Possible manifestation of the family non-universal Z' boson effects in lepton
polarization in rare, exclusive baryonic "Lambda_b -> Lambda l+l-" decay is
examined. It is observed that the double lepton polarizations P_TT and P_NN are
sensitive to the Z' contribution. Moreover, it is found that the zero position
of the polarized forward-backward asymmetry A_FB^LL is shifted to the left
compared to the standard model prediction. Therefore, determination of the zero
value of A_FB^LL is quite an efficient tool for establishing new Z' boson, but
also in discriminating various scenarios of the considered family non-universal
Z' model.

View original: http://arxiv.org/abs/1202.5444