We report measurements of the two-photon processes e+e-e+e - and e+e-e+e-K+K-, at an e+e- center-of-mass energy of 29 GeV. In the - data a high-statistics analysis of the f(1270) results in a width (f)=3.20.4 keV. The - continuum below the f mass is well described by a QED Born approximation, whereas above the f mass it is consistent with a QCD-model calculation if a large contribution from the f is assumed. For the K+K- data we find agreement of the high-mass continuum with the QCD prediction; limits on f(1520) and (1720) formation are presented.
ASJC Scopus subject areas
- Physics and Astronomy(all)