Measurements of the Absolute Branching Fractions of B^\pm --> K^\pm X_{c\bar c}

Details Measurements of the Absolute Branching Fractions of B^\pm --> K^\pm X_{c\bar c} Measurements of the Absolute Branching Fractions of B^\pm --> K^\pm X_{c\bar c}

2005-10-26

arxiv.org/abs/hep-ex/0510070v2

Phys.Rev.Lett.96:052002,2006

Physics

High Energy Physics

High Energy Physics - Experiment

7 pages, 3 postscript figues, submitted to PRL

Scientific paper

10.1103/PhysRevLett.96.052002

We study the two-body decays of B^\pm mesons to K^\pm and a charmonium state, X_{c\bar c}, in a sample of 210.5 fb^{-1} of data from the BaBar experiment. We perform measurements of absolute branching fractions BR(B^\pm --> K^\pm X_{c\bar c}) using a missing mass technique, and report several new or improved results. In particular, the upper limit BR(B^\pm --> K^\pm X(3872))<3.2 10^-4 at 90% CL and the inferred lower limit BR(X(3872) --> J/\psi\pi^+\pi^-)>4.2% will help in understanding the nature of the recently discovered X(3872).

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