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

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

2012-02-24

arxiv.org/abs/1202.5444v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

15 pages, 3 figures, LaTeX formatted

Scientific paper

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.

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