Study of B→X(3872)K, with X(3872)→J/ψπ+π-

Journal article

We present measurements of the decays B+→X(3872)K+ and B0→X(3872)K0 with X(3872)→J/ψπ+π-. The data sample used, collected with the BABAR detector at the PEP-II e+e- asymmetric-energy storage ring, corresponds to 455×106BB̄ pairs. Branching fraction measurements of B(B+→X(3872)K+)×B(X(3872)→J/ψπ+π-)=(8. 4±1.5±0.7)×10-6 and B(B0→X(3872)K0)×B(X(3872) →J/ψπ+π-)=(3.5±1.9±0.4)×10-6 are obtained. We set an upper limit on the natural width of the X(3872) of Γ<3.3MeV/c2 at the 90% confidence level. © 2008 The American Physical Society.

Authors: Aubert, B; Bona, M; Karyotakis, Y; Lees, J; Poireau, V

• Journal: Physical Review D
• Volume: 77
• Issue: 11
• Publication date: 2008-06-03
• DOI: 10.1103/PhysRevD.77.111101
• EISSN: 1550-2368
• ISSN: 1550-7998
• Language: English