Imprints of CP-violation asymmetries in rare ᴧb → ᴧl+l− decay in a family non-universal Z` model

paracha, m. ali; ahmed, ishtiaq; aslam, m. jamil;

We investigate the exclusive rare baryonic ᴧb → ᴧl+l− decay in a family non-universal Z` model, which is one of the natural extensions of the Standard Model. Using transition form factors, calculated in the framework of light-coneQCDsum rules,we analyze the effects of polarized and unpolarized CP-violation asymmetries on the above-mentioned semileptonic decays of the ᴧb baryon. Our results indicate that the values of unpolarized and polarized CP-violation
asymmetries are considerable in both the ᴧb → ᴧμ + μ − and ᴧb ᴧτ+τ− channels, and hence they give a clear indication of new physics arising from the neutral Z' gauge boson. It is hoped that the measurements of these CP-violating asymmetries will not only help us to find hints of new physics, but also provide a tool to determine the precise values of the parameters of the Z' gauge boson.