Resumen
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.
Idioma original | English |
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Número de artículo | 011105 |
Publicación | Physical Review D - Particles, Fields, Gravitation and Cosmology |
Volumen | 74 |
N.º | 1 |
DOI | |
Estado | Published - 27 jul 2006 |
Publicado de forma externa | Sí |
All Science Journal Classification (ASJC) codes
- Física nuclear y de alta energía
- Física y astronomía (miscelánea)