We present measurements of the decays B(+)-> X(3872)K(+) and B(0)-> X(3872)K(0) with X(3872) -> J/psi pi(+)pi(-). The data sample used, collected with the BABAR detector at the PEP-II e(+)e(-) asymmetric-energy storage ring, corresponds to 455x10(6)B (B) over bar pairs. Branching fraction measurements of B(B(+)-> X(3872)K(+)) x B(X(3872) -> J/psi pi(+)pi) = (8.4 +/- 1.5 +/- 0.7) x 10(-6) and B(B(0) -> X(3872)K(0)) x B(X(3872) -> J/psi pi(+)pi) = (3.5 +/- 1.9 +/- 0.4) x 10(-6) are obtained. We set an upper limit on the natural width of the X(3872) of Gamma < 3.3 MeV/c(2) at the 90% confidence level.
Study of B -> X(3872)K, with X(3872)-> J/psi pi(+)pi(-) RID C-5223-2009 RID C-5719-2008
CALDERINI, GIOVANNI;ANGELINI, CARLO;BATIGNANI, GIOVANNI;BETTARINI, STEFANO;FORTI, FRANCESCO;GIORGI, MARCELLO;PAOLONI, EUGENIO;RIZZO, GIULIANA;
2008-01-01
Abstract
We present measurements of the decays B(+)-> X(3872)K(+) and B(0)-> X(3872)K(0) with X(3872) -> J/psi pi(+)pi(-). The data sample used, collected with the BABAR detector at the PEP-II e(+)e(-) asymmetric-energy storage ring, corresponds to 455x10(6)B (B) over bar pairs. Branching fraction measurements of B(B(+)-> X(3872)K(+)) x B(X(3872) -> J/psi pi(+)pi) = (8.4 +/- 1.5 +/- 0.7) x 10(-6) and B(B(0) -> X(3872)K(0)) x B(X(3872) -> J/psi pi(+)pi) = (3.5 +/- 1.9 +/- 0.4) x 10(-6) are obtained. We set an upper limit on the natural width of the X(3872) of Gamma < 3.3 MeV/c(2) at the 90% confidence level.File in questo prodotto:
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