Study of the CP asymmetry of B0 -> J/psi K0S decays in ALEPH

ALEPH Collaboration

The decay B0 -> J/psi K0_S is reconstructed with J/psi -> e+ e- or mu+ mu- and K0_S -> pi+ pi-. From the full ALEPH dataset at LEP1 of about 4 million hadronic Z decays, 23 candida…