Pion Electroproduction at Elsa
Abstract
At the Electron Stretcher Accelerator ELSA the four momentum transfer dependence of the N to Δ transition has been investigated by measuring the vartheta N* and varphi N* angular distributions of the double differential pion production cross sections in a series of electron scattering coincidence experiments on hydrogen spanning the -K2-range from 0.04 GeV2 to 0.8 GeV2. In these experiments both final state isospin channels, pπ0 and nπ+, have been measured simultaneously. The preliminary results on the separation of the response functions RT + γLRL, RLT and RTT and the subsequently following extraction of the multipoles, both based on the angular dependence of the hadronic cross sections, have been reported in the case of the pπ0 channel in the previous NSTAR2000 proceedings1. Only the first and preliminary results on the decomposition of the hadronic cross sections in the nπ+ channel obtained with the large acceptance ELAN time-of-flight spectrometer are described here.
- Publication:
-
NSTAR 2001
- Pub Date:
- August 2001
- DOI:
- 10.1142/9789812810878_0003
- Bibcode:
- 2001pen..conf...19G