Department of Physics and Astronomy: Publications and Other Research
Date of this Version
8-13-2004
Abstract
We report the observation of a narrow state decaying into J/ψ π+ π- and produced in 220 pb-1 of p̅p 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.
Comments
Published by American Physical Society. Phys. Rev. Lett. 93, 072001 (2004). http://prl.aps.org. Copyright © 2004 American Physical Society. Permission to use.