We report the observation of a narrow state decaying into J/ψπ+π- and produced in 220 pb-1 of p overbar p collisions at √(s)=1.96 TeV in the CDFII experiment. We observe 730±90 decays. The mass is measured to be 3871.3±0.7(stat)±0.4(syst) MeV/c2, with an observed width consistent with the detector resolution. This is in agreement with the recent observation by the Belle Collaboration of the X(3872) meson.
Physical Review Letters
- Pub Date:
- August 2004
- Mesons with S=C=B=0 mass>2.5 GeV;
- Glueball and nonstandard multi-quark/gluon states;
- High Energy Physics - Experiment
- 6 pages, 2 figures