Lepton polarization effects in Lambda(b) -> Lambda l(+)l(-) decay in family non-universal Z ' model


PHYSICS LETTERS B, vol.718, no.2, pp.566-572, 2012 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 718 Issue: 2
  • Publication Date: 2012
  • Doi Number: 10.1016/j.physletb.2012.11.013
  • Journal Name: PHYSICS LETTERS B
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.566-572
  • Middle East Technical University Affiliated: Yes


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-NN. P-TT and P-TN are sensitive to the Z' contribution. Moreover, it is found that the values of the polarized forward-backward asymmetry A(FB)(LL) are different in Standard Model (SM) and family non-universal Z' model in different regions of q(2), and therefore can serve as an efficient tool for establishing new physics beyond the SM. (C) 2012 Elsevier B.V. All rights reserved.