Observation Of The Narrow State X(3872)-> J/Psi Pi(+)Pi(-) In (P)Over-Barp Collisions At Root S=1.96 Tev
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PHYSICAL REVIEW LETTERS（2004）
Cited 693|Views265
Abstract
We report the observation of a narrow state decaying into J/psipi(+)pi(-) and produced in 220 pb(-1) of (p) over barp collisions at roots=1.96 TeV in the CDF II experiment. We observe 730+/-90 decays. The mass is measured to be 3871.3+/-0.7(stat)+/-0.4(syst) MeV/c(2), 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.
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