Extracting B(ω→π+π-) from the timelike pion form factor

S. Gardner, H. B. O'Connell

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


We extract the G-parity-violating branching ratio B(ω→π+π-) from the effective ρ0-ω mixing matrix element Π̃ρω(s), determined from e+e-→π+π- data. The ω→π+π- partial width can be determined either from the timelike pion form factor or through the constraint that the mixed physical propagator Dρωμν(s) possesses no poles. The two procedures are inequivalent in practice, and we show why the first is preferred, to find finally B(ω→π+π-)=1.9±0.3%.

Original languageEnglish
Article number076002
Pages (from-to)1-6
Number of pages6
JournalPhysical review D
Issue number7
StatePublished - Apr 1 1999

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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