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.

Aubert, B., Bona, M., Karyotakis, Y., Lees, J., Poireau, V., Prencipe, E., et al. (2008). Study of B→X(3872)K, with X(3872)→J/ψπ+π-. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 77(11) [10.1103/PhysRevD.77.111101].

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

CARPINELLI, Massimo;
2008

Abstract

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.
Articolo in rivista - Articolo scientifico
BABAR detector
English
2008
77
11
111101
none
Aubert, B., Bona, M., Karyotakis, Y., Lees, J., Poireau, V., Prencipe, E., et al. (2008). Study of B→X(3872)K, with X(3872)→J/ψπ+π-. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 77(11) [10.1103/PhysRevD.77.111101].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/389627
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