We present results of a search for the X(3872) in B-0-> X(3872)K-S(0), X(3872) -> J/psi pi(+)pi(-), improved measurements of B- -> X(3872)K-, and a study of the J/psi pi(+)pi(-) mass region above the X(3872). We use 232 x 10(6) B (B) over bar pairs collected at the Upsilon(4S) resonance with the BABAR detector at the PEP-II e(+)e(-) asymmetric-energy storage rings. The results include the 90% confidence interval 1.34x10(-6) < B(B-0 -> X(3872)K-0, X -> J/psi pi(+)pi(-)) < 10.3 x 10(-6) and the branching fraction B(B- -> X(3872)K-, X -> J/psi pi(+)pi(-)) = (10.1 +/- 2.5 +/- 1.0) x 10(-6). We observe a (2.7 +/- 1.3 +/- 0.2)MeV/c(2) mass difference of the X(3872) produced in the two decay modes. Furthermore, we search for the Y(4260) in B decays and set the 95% C.L. upper limit B(B--> Y(4260)K-, Y(4260) -> J/psi pi(+)pi(-)) < 2.9 x 10(-5).

Study of the X(3872) and Y(4260) in B-0 -> J/psi pi(+)pi K--(0) and B--> J/psi pi(+)pi K--(-) decays / Aubert, B., Barate, R., Boutigny, D., Couderc, F., Karyotakis, Y., Lees, J.p., Poireau, V., Tisserand, V., Zghiche, A., Grauges, E., Palano, A., Pappagallo, M., Pompili, A., Chen, J.c., Qi, N.d., Rong, G., Wang, P., Zhu, Y.s., Eigen, G., Ofte, I., et al.. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - 73:(2006). [10.1103/physrevd.73.011101]

Study of the X(3872) and Y(4260) in B-0 -> J/psi pi(+)pi K--(0) and B--> J/psi pi(+)pi K--(-) decays

DEL RE, Daniele;RAHATLOU, SHAHRAM;BELLINI, Fabio;CAVOTO, Gianluca;FACCINI, Riccardo;FERRONI, Fernando;GASPERO, Mario;VOENA C;
2006

Abstract

We present results of a search for the X(3872) in B-0-> X(3872)K-S(0), X(3872) -> J/psi pi(+)pi(-), improved measurements of B- -> X(3872)K-, and a study of the J/psi pi(+)pi(-) mass region above the X(3872). We use 232 x 10(6) B (B) over bar pairs collected at the Upsilon(4S) resonance with the BABAR detector at the PEP-II e(+)e(-) asymmetric-energy storage rings. The results include the 90% confidence interval 1.34x10(-6) < B(B-0 -> X(3872)K-0, X -> J/psi pi(+)pi(-)) < 10.3 x 10(-6) and the branching fraction B(B- -> X(3872)K-, X -> J/psi pi(+)pi(-)) = (10.1 +/- 2.5 +/- 1.0) x 10(-6). We observe a (2.7 +/- 1.3 +/- 0.2)MeV/c(2) mass difference of the X(3872) produced in the two decay modes. Furthermore, we search for the Y(4260) in B decays and set the 95% C.L. upper limit B(B--> Y(4260)K-, Y(4260) -> J/psi pi(+)pi(-)) < 2.9 x 10(-5).
2006
01 Pubblicazione su rivista::01a Articolo in rivista
Study of the X(3872) and Y(4260) in B-0 -> J/psi pi(+)pi K--(0) and B--> J/psi pi(+)pi K--(-) decays / Aubert, B., Barate, R., Boutigny, D., Couderc, F., Karyotakis, Y., Lees, J.p., Poireau, V., Tisserand, V., Zghiche, A., Grauges, E., Palano, A., Pappagallo, M., Pompili, A., Chen, J.c., Qi, N.d., Rong, G., Wang, P., Zhu, Y.s., Eigen, G., Ofte, I., et al.. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - 73:(2006). [10.1103/physrevd.73.011101]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/231951
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