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%.
|Number of pages||6|
|Journal||Physical review D|
|State||Published - Apr 1 1999|
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)