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.
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Titolo: | Observation of the narrow state X(3872) ---> J / psi pi+ pi- in anti-p p collisions at s**(1/2) = 1.96-TeV |
Autori: | |
Data di pubblicazione: | 2004 |
Rivista: | |
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. |
Handle: | http://hdl.handle.net/11580/8651 |
Appare nelle tipologie: | 1.1 Articolo in rivista |
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