Observation and properties of the X(3872) decaying to J/ψπ+π- in pp̅ collisions at √s=1.96 TeV

Abazov, V. M. ; Narasimham, V. S. ; et., al (2004) Observation and properties of the X(3872) decaying to J/ψπ+π- in pp̅ collisions at √s=1.96 TeV Physical Review Letters, 93 (6). 162002_1-162002_6. ISSN 0031-9007

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Official URL: http://prl.aps.org/abstract/PRL/v93/i16/e162002

Related URL: http://dx.doi.org/10.1103/PhysRevLett.93.162002

Abstract

We report the observation of the X(3872) in the J/ψ π+π- channel, with J/ψ decaying to μ+μ-, in pp̅ collisions at √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.

Item Type:Article
Source:Copyright of this article belongs to The American Physical Society.
ID Code:34892
Deposited On:02 May 2011 13:18
Last Modified:17 May 2016 17:46

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