The X(3872) at CDF II

Details The X(3872) at CDF II The X(3872) at CDF II

2004-09-24

arxiv.org/abs/hep-ex/0409052v1

Int.J.Mod.Phys.A20:3765-3767,2005

Physics

High Energy Physics

High Energy Physics - Experiment

Meeting of the Division of Particles and Fields, UC Riverside, CA, 26-31 August 2004

Scientific paper

10.1142/S0217751X05027552

Last year's X(3872) discovery was confirmed with the CDF II detector in pbarp collisions. We measure its mass to be $3871.3 \pm 0.7 \pm 0.4 MeV/c2$. The source of X-mesons in the large CDF sample is resolved by studying their vertex displacement. We find $16.1 \pm 4.9 \pm 2.0$% of our X-sample comes from decays of b-hadrons, and the remainder from prompt sources: either direct production or by decay of (unknown) short-lived particles. The mix of production sources is similar to that observed for the psi(2S) charmonium state.

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