This paper reports on the most comprehensive data set obtained on differential and fully integrated cross sections for the process ep→e′pπ+π−. The data were collected with the CLAS detector at Jefferson Laboratory. Measurements were carried out in the as yet unexplored kinematic region of photon virtuality 0.2
Physical Review C
Fedotov, G. V.; Biselli, Angela; and CLAS Collaboration, "Electroproduction of pπ+π− off protons at 0.2" (2009). Physics Faculty Publications. 55.
G. V. Fedotov et al. [CLAS Collaboration], "Electroproduction of pπ+π− off protons at 0.2