Measurement of branching ratio and B-s(0) lifetime in the decay B-s(0) -> J/psi f(0)(980) at CDF

Abstract

We present a study of B0 decays to the CP-odd final state J/f0(980) with ?and f0(980) ?0. Using p？ collision data with an integrated luminosity of 3.8 fb?01 collected by the CDF II detector at the Tevatron we measure a B0 s lifetime of B0 s J f0(980)) = 1.70+0.12 ?60.11(stat)0.03(syst) ps. This is the first measurement of the B0 s lifetime in a decay to a CP eigenstate and corresponds in the standard model to the lifetime of the heavy B0 s eigenstate.