Abstract
Using a sample of 3.08×106 ψ(2S) decays collected at s=3.686GeV with the CLEO detector at the Cornell Electron Storage Ring, we have measured the branching fractions for ψ(2S) decays to pseudoscalar pairs π+π-, K+K- and KS0KL0. We obtain B(ψ(2S)→π+π-)<2.1×10-5 (90% C.L.), B(ψ(2S)→K+K-)=(6.3±0.6(stat)±0.3(syst))×10- 5, and B(ψ(2S)→KS0KL0)=(5.8±0.8(stat)±0.4(syst)) ×10-5. The branching fractions allow extraction of the relative phase Δ=(95±15)° and strength ratio R=(2.5±0.4) of the three-gluon and one-photon amplitudes for these modes.
Original language | English |
---|---|
Article number | 011105 |
Journal | Physical Review D - Particles, Fields, Gravitation and Cosmology |
Volume | 74 |
Issue number | 1 |
DOIs | |
Publication status | Published - 27 Jul 2006 |
Externally published | Yes |
Bibliographical note
Copyright:Copyright 2008 Elsevier B.V., All rights reserved.
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics
- Physics and Astronomy (miscellaneous)