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Observation of the narrow state X(3872) → J/ψπ+π- in p̄p collisions at √s = 1.96 TeV

par Acosta, Darin E.;De Lentdecker, Gilles ; [et al.]
Référence Physical review letters, 93, 7, page (1-6), 072001
Publication Publié, 2004

Article révisé par les pairs

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Résumé :

The observation of a state consistent with X(3872) decaying into J/ψπ+π- was reported. The X(3872) mass was measured to be 3871.3±0.7(stat)±0.4(syst)MeV/c2 from a sample of 730±90 candidates. The observed width was consistent with the detector resolution. The results were found to be converging well with the measurements by the Belle Collaboration using b± decays.