Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2008-07-30
Physics
High Energy Physics
High Energy Physics - Experiment
16 pages, 6 postscript figures. Contributed to the 34th International Conference On High Energy Physics (ICHEP 2008)
Scientific paper
We present a measurement of the branching fraction of neutral B meson decaying to final states containing a K_1 meson, i.e. K_1(1270) and K_1(1400), and a charged pion. The data, collected with the BaBar detector at the Stanford Linear Accelerator Center, represent 454 million BBbar pairs produced in e+e- annihilation. We measure the branching fraction BF(B0 -> K_1+ pi-) = (31.0 +- 2.7 +- 6.9) x 10^-6, where the first error quoted is statistical and the second is systematic. In the framework of the K-matrix formalism used to describe these decays, we also set limits on the ratio of the production constants for the K_1(1270)+ and K_1(1400)+ mesons in B0 decays.
"The BABAR Collaboration
Aubert B.
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