The ep→e′π+n reaction was studied in the first and second nucleon resonance regions in the 0.25 GeV2
Physical Review C
Egiyan, H.; Biselli, Angela; and CLAS Collaboration, "Single π+ electroproduction on the proton in the first and second resonance regions at 0.25GeV2" (2006). Physics Faculty Publications. 78.
H. Egiyan et al. [CLAS Collaboration], "Single π+ electroproduction on the proton in the first and second resonance regions at 0.25GeV2