Precision measurement of the X(3872) mass in J/psi pi(+) pi(-) decays.

Journal article

We present an analysis of the mass of the X(3872) reconstructed via its decay to J/psi pi(+)pi(-) using 2.4 fb(-1) of integrated luminosity from pp collisions at square root(s)=1.96 TeV, collected with the CDF II detector at the Fermilab Tevatron. The possible existence of two nearby mass states is investigated. Within the limits of our experimental resolution the data are consistent with a single state, and having no evidence for two states we set upper limits on the mass difference between ...

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Authors: Aaltonen, T; Adelman, J; Akimoto, T; Alvarez González, B; Amerio, S

• Publication status: Published
• Journal: Physical Review Letters
• Volume: 103
• Issue: 15
• Pages: 152001
• Publication date: 2009-10-01
• DOI: 10.1103/physrevlett.103.152001
• EISSN: 1079-7114
• ISSN: 0031-9007
• Language: English
• Keywords: CDF Collaboration