Abstract
We reinvestigate photoproduction off the nucleon target, based on an effective Lagrangian approach. We include higher nucleon resonances such as , , , and , of which the data are taken from the 2012 edition of Review of Particle Physics, in addition to the -channel diagrams (, , and ), the -channel nucleon, and -channel hyperon (, , and ) contributions. We find that the and resonances are essential in describing the new CLAS Collaboration data for charged photoproduction. On the other hand, they rarely affect neutral photoproduction.
7 More- Received 7 February 2014
DOI:https://doi.org/10.1103/PhysRevD.90.014021
© 2014 American Physical Society