Structure of final states with a high transverse momentum π0 in proton-proton collisions

P. Darriulat, P. Dittmann, K. Eggert, M. Holder, K. T. McDonald, T. Modis, F. L. Navarria, A. Seiden, J. Strauss, G. Vesztergombi, E. G.H. Williams

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We present a study of the final state structure in proton-proton collisions (√s = 53 GeV) where a large transverse momentum π0 (pt > 2 GeV/c) is produced at an angle of 90°. Charged secondaries have been detected and momentum analysed in the split field magnet detector at the CERN Intersecting Storage Rings. The large angular coverage of this detector extends over ±2.5 units of rapidity and ±30° of azimuth with respect to the trigger π0, both towards and away from it. In each of these directions, where we observe similar strong correlations, we present charged particle distributions, in rapidity and momentum. In the hemisphere containing the trigger π0 we have measured the cross section for inclusive production of large transverse momentum ρ{variant}± mesons. In the opposite hemisphere the data exhibit several features predicted by hard scattering quark-parton models: coplanarity and short-range rapidity correlation for the large transverse momentum secondaries as well as a transverse momentum sharing distribution similar to that observed in deep inelastic electro-production and in e+e- collisions.

Original languageEnglish
Pages (from-to)429-456
Number of pages28
JournalNuclear Physics, Section B
Issue number3
Publication statusPublished - May 17 1976

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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    Darriulat, P., Dittmann, P., Eggert, K., Holder, M., McDonald, K. T., Modis, T., Navarria, F. L., Seiden, A., Strauss, J., Vesztergombi, G., & Williams, E. G. H. (1976). Structure of final states with a high transverse momentum π0 in proton-proton collisions. Nuclear Physics, Section B, 107(3), 429-456.