Yayın: Measurement of the branching fraction for ψ(3686) → ωK+K-
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Tarih
2014-06-24
Kurum Yazarları
Tapan, İhan
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayımcı
American Physical Society
Özet
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.
Açıklama
Anahtar kelimeler
Astronomy & astrophysics, Physics, Narrow resonance, Discovery