With 1.06 x 10(8) psi(3686) events collected with the BESIII detector, the branching fraction of psi(3686) -> omega K+K- is measured to be (1.54 +/- 0.04 +/- 0.11) x 10(-4). This is the most precise result to date, due to the largest psi(3686) sample, improved signal reconstruction efficiency, good simulation of the detector performance, and a more accurate knowledge of the continuum contribution. Using the branching fraction of J/psi -> omega K+K-, the ratio B(psi(3868) -> K+K-)/B(J/psi -> K+K-) is determined to be (18.4 +/- 3.7)%. This constitutes a significantly improved test of the 12% rule, with the uncertainty now dominated by the J/psi branching fraction.

Measurement of the branching fraction for psi(3686) -> omega K+K-

DESTEFANIS, MARCO GIOVANNI;GRECO, Michela;HU, Jifeng;MAGGIORA, MARCO;SPATARO, STEFANO GIOVANNI;
2014-01-01

Abstract

With 1.06 x 10(8) psi(3686) events collected with the BESIII detector, the branching fraction of psi(3686) -> omega K+K- is measured to be (1.54 +/- 0.04 +/- 0.11) x 10(-4). This is the most precise result to date, due to the largest psi(3686) sample, improved signal reconstruction efficiency, good simulation of the detector performance, and a more accurate knowledge of the continuum contribution. Using the branching fraction of J/psi -> omega K+K-, the ratio B(psi(3868) -> K+K-)/B(J/psi -> K+K-) is determined to be (18.4 +/- 3.7)%. This constitutes a significantly improved test of the 12% rule, with the uncertainty now dominated by the J/psi branching fraction.
2014
89
112006-1
112006-8
http://journals.aps.org/prd/abstract/10.1103/PhysRevD.89.112006
M. Ablikim;M. N. Achasov;X. C. Ai;O. Albayrak;M. Albrecht;D. J. Ambrose;F. F. An;Q. An;J. Z. Bai;R. Baldini Ferroli;Y. Ban;D. W. Bennett;J...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/155091
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