Eur. Phys. J. C (2004) 35: 197-206
https://doi.org/10.1140/epjc/s2004-01817-2

theoretical physics

Double-lepton polarization asymmetries in the decaybeyond the standard model

Physics Department, Middle East Technical University, 06531, Ankara, Turkey

^* e-mail: taliev@metu.edu.tr

Abstract

General expressions for the double-lepton polarizations in the decay are obtained, using a model independent effective Hamiltonian, including all possible interactions. Correlations between the averaged double-lepton polarization asymmetries and the branching ratio, as well as the averaged single-lepton polarization asymmetry are studied. It is observed that a study of the double-lepton polarization asymmetries can serve as a good test for establishing new physics beyond the standard model.