https://doi.org/10.1051/epjconf/20123709009
Extracting the f0(980) signal from the photoproduced π+ π- spectrum
1 State School of Higher Education in Oświęcim, Kolbego 8, 32–600, Oświęcim Poland
2 H. Niewodniczański Institute of Nuclear Physics PAN, Radzikówskiego 152, 31–342, Krakow Poland
a e-mail: lukasz.bibrzycki@ifj.edu.pl
b e-mail: leonard.lesniak@ifj.edu.pl
We present a phenomenological analysis of the π+π- 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 π+π- efective masses around 1 GeV. This pattern is attributed to the photoproduction of the scalar-isoscalar resonance f0(980). By fitting the model parameters to the data we obtain the strengths of the resonant and nonresonant parts of the S-wave photoproduction amplitude. We calculate the f0(980) photoproduction cross section which is smaller than previous estimations by a factor of about 5. A new estimation of the product of the σ meson couplings to nucleon and to the γρ system |gNNσgγρσ| is given.
© Owned by the authors, published by EDP Sciences, 2012
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
