Electroproduction of pions on the three-nucleon systems

The electroproduction of pions on 3He is being studied with the assumption that the basic pion production mechanisms can be described by the N(e,e'π) model developed by Nozawa and Lee. In the impulse approximation, the 3He(e,e'π) cross section is then determined from the N and Δ spectral functions generated from Hannover's three-body calculation including the Δ. The objective is to investigate the effects due to the Δ components in 3He, as suggested by Lipkin and Lee. This is being investigated by calculating the ratio between 3He(e,e'π+p) and 3He(e,e'π-). In a calculation for 3He(e,e'π+p) at very high momentum transfer, questions concerning color transparency of Δ++ propagation can be addressed