Phase difference between the electromagnetic and strong amplitudes for ψ(2S) and J/ψ decays into pairs of pseudoscalar mesons

Z. Metreveli*, S. Dobbs, A. Tomaradze, T. Xiao, Kamal K. Seth, J. Yelton, D. M. Asner, G. Tatishvili, G. Bonvicini

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Using the data for 24.5×106 ψ(2S) produced in e +e - annihilations at √s=3686MeV at the CESR-c e +e - collider and 8.6×106J/ψ produced in the decay ψ(2S)→π +π -J/ψ, the branching fractions for ψ(2S) and J/ψ decays to pairs of pseudoscalar mesons, π +π -, K +K -, and K SK L, have been measured using the CLEO-c detector. We obtain branching fractions B(ψ(2S)→π +π -)= (7.6±2.5±0.6)×10 -6, B(ψ(2S)→K +K -)=(74.8±2.3±3.9)×10 -6, B(ψ(2S)→K SK L)=(52.8±2.5±3.4) ×10 -6, and B(J/ψ→π +π -)=(1. 47±0.13±0.13)×10 -4, B(J/ψ→K +K -)=(2.86±0.09±0.19)×10 -4, B(J/ψ→K SK L)=(2.62±0.15±0.14) ×10 -4, where the first errors are statistical and the second errors are systematic. The phase differences between the amplitudes for electromagnetic and strong decays of ψ(2S) and J/ψ to 0 -+ pseudoscalar pairs are determined by a Monte Carlo method to be δ(ψ(2S) PP=(110.5-9.5+16.0)° and δ(J/ψ) PP=(73.5-4.5+5.0)°. The difference between the two is Δδδ(ψ(2S)) PP-δ(J/ψ) PP=(37.0-10.5+16.5)°.

Original languageEnglish (US)
Article number092007
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume85
Issue number9
DOIs
StatePublished - May 14 2012
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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