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Experimental results on proton diffractive dissociation |
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| Authors: | M Asai J L Bailly H B?ttcher F Bruyant C Caso Y Chiba H Dibon B Epp A Ferrando F Fontanelli S N Ganguli T Gémesy R Hamatsu P Hidas T Hirose J Hrubec T Kageya N Khalatyan E Kistenev I Kita S Kitamura V Kubik J MacNaughton M Markytan S Matsumoto I S Mittra L Montanet G Neuhofer G Pinter P Porth T Rodrigo J Singh S Squarcia K Takahashi R Tanaka L A Tikhonova U Trevisan R Wischnewski T Yamagata S A Zotkin NA EHS-RCBC Collaboration |
| Institution: | 1. Hiroshima University, Hiroshima 730, Japan 2. Faculté des Sciences, Université de l'Etat, B-7000, Mons, Belgium 3. Institut für Hochenergiephysik, Akademie der Wissenschaften, DDR-1615, Zeuthen, German Democratic Republic 4. CERN, European Organization for Nuclear Research, CH-1211, Geneva 23, Switzerland 5. University of Genova and INFN, I-16146, Genova, Italy 6. Institut für Hochenergiephysik, A-1050, Wien, Austria 7. Institut für Experimentalphysik, A-6020, Innsbruck, Austria 8. Centro de Investigaciones Energéticas, Medioambientales y tecnológicas, E-28040, Madrid, Spain 9. Tata Institute of Fundamental Research, 400005, Bombay, India 10. Central Research Institute for Physics, H-1525, Budapest 114, Hungary 11. Tokyo Metropolitan University, Tokyo 158, Japan 12. Institute for High Energy Physics, Serpukhov, SU-142284, Protvino, USSR 13. Tokyo University of Agriculture and Technology, Tokyo 184, Japan 14. Chuo University, Tokyo 112, Japan 15. Panjab University, 160014, Chandigarh, India 16. Moscow State University, SU-117234, Moscow, USSR |
| Abstract: | Properties of proton diffractive dissociation have been investigated for four-prong final states in proton-proton reactions at 360 GeV/c, in particular forpp→ppπ +π? mπ 0(m=0,1,2). Mass distributions and decay angular distributions are given. The decay of the diffractive system is seen to be very anisotropic, and largep T is suppressed at higher masses. It is found that the “pomeron” couples with a single valence quark of the incident proton, but indications for a diquark-pomeron coupling are also found. Similarities with fragmentation in lepton-hadron deep inelastic scattering are underlined. |
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