Extracting the f sub( 0)(980) signal from the photoproduced pi super( +) pi super( -) spectrum

The authors present a phenomenological analysis of the ... photoproduction data obtained by the CLAS collaboration at the Thomas Jefferson Laboratory. A special emphasis is put on the interference pattern observed in the moments of angular distribution for the ...- effective masses around 1 GeV. This pattern is attributed to the photoproduction of the scalar-isoscalar resonance f...(980). By fitting the model parameters to the data they obtain the strengths of the resonant and nonresonant parts of the S-wave photoproduction amplitude. They calculate the f...(980) photoproduction cross section which is smaller than previous estimations by a factor of about 5. A new estimation of the product of the ... meson couplings to nucleon and to the ... system ... is given. (ProQuest: ... denotes formulae/symbols omitted.)