Coincidence measurements of (p,n) reactions at 1.5 GeV/con C and H in the Δ excitation region
- 7 October 1991
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 67 (15), 1982-1985
- https://doi.org/10.1103/physrevlett.67.1982
Abstract
Coincidence measurements of (p,n) reactions at 1.5 GeV/c in the Δ excitation region have been carried out for the first time. The location of the Δ peak in the neutron spectrum is found to be dependent on the coincident particles. The peak in coincidence with p is shifted to lower momenta compared to the free case, in contrast to the inclusive spectrum and the coincidence with other particles where it is shifted to higher momenta. The p invariant-mass distribution for C is significantly lower and broader than that for H. The coincidence data set stringent constraints on theoretical models introduced to interpret the peak shift in inclusive spectra.
Keywords
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