We report the observation of a narrow state decaying into J/ψπ+π- and produced in 220 pb-1 of p̄p collisions at √s=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/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.
Observation of the narrow state X(3872) ---> J / psi pi+ pi- in anti-p p collisions at s**(1/2) = 1.96-TeV
PAGLIARONE, Carmine Elvezio;
2004-01-01
Abstract
We report the observation of a narrow state decaying into J/ψπ+π- and produced in 220 pb-1 of p̄p collisions at √s=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/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.File in questo prodotto:
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