s-and t-channel helicity conservation of pion induced nucleon diffraction dissociation at 3.9 GeV/c and the implications of a two-component model

G. Berlad, B. Haber, M. F. Hodous, R. I. Hulsizer, V. Kistiakowsky, A. Levy, I. A. Pless, R. A. Singer, J. Wolfson, R. K. Yamamoto

Research output: Contribution to journalArticlepeer-review

Abstract

A study of schannel and t-channel helicity conservation has been carried out on a prism plot separated sample of 3.9 GeV/c π±p → π (Nπ)dd diffraction dissociation events. s-channel helicity conservation is found to be strongly violated while t-channel helicity conservation is found to be mildly violated. These results are similar to that found at 11.7 GeV/c. We explain these violations on the basis of a "two-component model" of which the first component is a single exchange amplitude. We postulate that this amplitude is the generalization of the pomeron exchange amplitude which may conserve s-channel helicity. The second component of the model is a double exchange mechanism which strongly violates s-channel helicity. The predictions of this model agree with the experimental data.

Original languageEnglish
Pages (from-to)29-54
Number of pages26
JournalNuclear Physics, Section B
Volume78
Issue number1
DOIs
StatePublished - 18 Aug 1974
Externally publishedYes

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