The pp→pnπ+ reaction is a channel with the largest total cross section for pp collision in COSY/CSR energy region. In this work, we investigate individual contributions from various N∗ and Δ∗ resonances with mass up to about 2 GeV for the pp→pnπ+ reaction. We extend a resonance model, which can reproduce the observed total cross section quite well, to give theoretical predictions of various differential cross sections for the present reaction at Tp=2.88 GeV. It could serve as a reference for identifying new physics in the future experiments at HIRFL-CSR.
@article{arxiv.0902.1818,
title = {Theoretical study on pp --> p n pi+ reaction at medium energies},
author = {Z. Ouyang and J. J. Xie and B. S. Zou and H. S. Xu},
journal= {arXiv preprint arXiv:0902.1818},
year = {2009}
}