Measurement of Branching Fractions in B0 -> J/Psi pi+pi- Decay

2004/08/23 by Abe, K.
#FOS: Physical sciences #High Energy Physics - Experiment (hep-ex)

paper · doi:10.48550/arxiv.hep-ex/0408107

Abstract

We report a measurement of the branching fractions in the B0->J/Psi pi+pi- decay based on a 140/fb data sample collected at the Upsilon(4S) energy with the Belle detector at the KEKB e+e- collider. Charged pion pairs are found to arise mainly from rho0 and f2 mesons; an upper limit for the non-resonant contribution is also set. The following branching fractions are obtained: Br(B0->J/Psi rho0)=(2.8+-0.3+-0.3)*10^-5, Br(B0->J/Psi f2)<1.5*10^-5(at 90% C.L.) and Br(B0->J/Psi (pi+pi-)non-res.)<1.5*10^-5(at 90% C.L.).

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