Lepton Asymmetries in FCNC Decays of Λb

Abstract

Lepton polarization asymmetries for the flavor-changing neutral current (FCNC) dileptonic decays of Λb baryons are calculated using single-component analytic (SCA) and multicomponent numerical (MCN) form factors. We show that these polarization asymmetries are insensitive to the transition form factors and, thus, the effects of QCD in the nonperturbative regime. Therefore, these observables can provide somewhat model independent ways of extracting the Wilson coefficients.

3 pages, 2 tables, 1 figure, To appear in the proceedings for the Eleventh Conference on the Intersections of Particle and Nuclear Physics (CIPANP 2012)