Coincidence measurements of (p,n) reactions at 1.5 GeV/c on C and H in the Delta excitation region.
Coincidence measurements of (p,n) reactions at 1.5 GeV/c on C and H in the Delta excitation region.
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DOI：
10.1103/physrevlett.67.1982
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发表时间：
1991-10
影响因子：
8.6
通讯作者：
Chiba;Kobayashi;Nagae;Arai;Katō;Kitayama;Manabe;Tanaka;Tomizawa;Beatty;Edwards;Glashausser;Kumbartzki;Ransome;Baker
中科院分区：
文献类型：
--
作者：
Chiba;Kobayashi;Nagae;Arai;Katō;Kitayama;Manabe;Tanaka;Tomizawa;Beatty;Edwards;Glashausser;Kumbartzki;Ransome;Baker
Coincidence measurements of ({ital p},{ital n}) reactions at 1.5 GeV/{ital c} in the {Delta} excitation region have been carried out for the first time. The location of the {Delta} peak in the neutron spectrum is found to be dependent on the coincident particles. The peak in coincidence with {ital p}{pi}{sup +} 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 {ital p}{pi}{sup +} 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.
Coincidence measurements of ({ital p},{ital n}) reactions at 1.5 GeV/{ital c} in the {Delta} excitation region have been carried out for the first time. The location of the {Delta} peak in the neutron spectrum is found to be dependent on the coincident particles. The peak in coincidence with {ital p}{pi}{sup +} 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 {ital p}{pi}{sup +} 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.