D0 Collaboration, The and Bertram, I. A. and Borissov, Guennadi and Ratoff, Peter N. and Sopczak, Andre and Davies, B. and Doidge, M. (2004) Observation and properties of the X(3872) decaying to J/psi pi+ pi- in p anti-p collitions at s**(1/2) = 1.96-TeV. Physical Review Letters, 93 (16). p. 162002. ISSN 1079-7114Full text not available from this repository.
We report the observation of the X(3872) in the J/ψπ+π- channel, with J/ψ decaying to μ+μ-, in pp̅ collisions at sqrt[s]=1.96 TeV. Using approximately 230 pb-1 of data collected with the Run II D0 detector, we observe 522±100 X(3872) candidates. The mass difference between the X(3872) state and the J/ψ is measured to be 774.9±3.1(stat)±3.0(syst) MeV/c2. We have investigated the production and decay characteristics of the X(3872) and find them to be similar to those of the ψ(2S) state.
|Journal or Publication Title:||Physical Review Letters|
|Subjects:||Q Science > QC Physics|
|Departments:||Faculty of Science and Technology > Physics|
|Deposited On:||24 Feb 2009 14:48|
|Last Modified:||26 Jul 2012 16:18|
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