Abstract
Using a magnetic spectrometer a comparative study was made of the energy spectra of π + and π − -mesons produced in free pp-collisions as well as in pp- and pn-collisions in deutrons and in carbon nuclei at 654 MeV. The forms of the spectra of pions from deuterium and carbon are found to differ due to: a) a larger extent of correlation of nucleons in carbon nuclei than in deuterons; b) differences in the momentum distributions of nucleons in these nuclei; c) secondary pion-nucleon interactions in carbon nuclei. At ≈ 90° in the centre-of-mass system of two colliding nucleons the ratio of the differential cross sections for the production of π +-mesons on free protons and on protons in deuterons and in carbon nuclei was found to be equal to dσ dω [ p+ p→π +] H : dσ dω [ p+ p→π +] D : dσ dω [ p+ p→π +] C = 1:0.79:0.40 , whereas the yields of π − -mesons per neutron for deuterium and carbon were found to be equal. The measured ratio (d σ +/d ω)/(d σ −/d ω) of the differential cross sections for the production of positive and negative pions on deuterium and carbon is equal to 10.3±1.3 and 6.0±0.8, respectively. The decrease of the value of this ratio for carbon is caused by a considerable contribution of the secondary exchange interaction π 0+ n → π −+p to the yield of π − -mesons.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
