✍ Scribed by J.C. Nacher; E. Oset
No coin nor oath required. For personal study only.
We have extended a model for the γ N → ππN reaction to virtual photons and selected the diagrams which have a in the final state. With this model we have evaluated cross sections for the virtual photon cross section as a function of Q 2 for different energies. The agreement found with the γ v p → 0 π + and γ v p → ++ π -reactions is good. The sensitivity of the results to N transition form factors is also studied. The present reaction, selecting a particular final state, is an extra test for models of the γ v N → ππN amplitude. The experimental measurement of the different isospin channels for this reaction are encouraged as a means to unravel the dynamics of the two pions photoproduction processes.
📜 SIMILAR VOLUMES
Coherent 7c ° electroproduction on 4He was studied using the internal target facility of the AmPS electron storage ring at NIKHEF. This 4He(e,e'4He)Tr° experiment is the first on exclusive 7c ° electroproduction on a complex nucleus. The experiment was performed at a luminosity of about 1033 cm-2s -