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 |
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Authors: | G Berlad B Haber MF Hodous RI Hulsizer V Kistiakowsky A Levy IA Pless RA Singer J Wolfson RK Yamamoto |
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Institution: | Massachusetts Institute of Technology, Cambridge, Massachusetts, 02139, USA |
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Abstract: | A study of schannel and t-channel helicity conservation has been carried out on a prism plot separated sample of 3.9 GeV/cπ±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. |
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Keywords: | Aachen-Berlin-Bonn-CERN-Cracow-Heidelberg-Warsaw Collaboration |
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