Experimental study of the emergence of two-jet dominance in pp collisions at √s = 630 GeV

J.A. Appel, P. Bagnaia, M. Banner, R. Battiston, K. Bernlöhr, K. Borer, M. Borghini, G. Carboni, V. Cavasinni, P. Cenci, J.-C. Chollet, A.G. Clark, C. Conta, P. Darriulat, B. De Lotto, T. Del Prete, L. Di Lella, J. Dines-Hansen, K. Einsweiler, R. EngelmannL. Fayard, M. Fraternali, D. Froidevaux, J.-M. Gaillard, O. Gildemeister, V.G. Goggi, C. Gössling, B. Hahn, H. Hänni, J.R. Hansen, P. Hansen, N. Harnew, T. Himel, L. Iconomidou-Fayard, P. Jenni, E.E. Kluge, O. Kofoed-Hansen, E. Lançon, M. Livan, S. Loucatos, B. Madsen, P. Mani, B. Mansoulié, G.C. Mantovani, L. Mapelli, K. Meier, B. Merkel, R. Mollerud, M. Moniez, R. Moning, M. Morganti, C. Onions, M.A. Parker, G. Parrour, F. Pastore, M. Pepe, H. Plothow-Besch, M. Polverel, J.-P. Repellin, A. Rimoldi, A.F. Rothenberg, A. Roussarie, V. Ruhlmann, G. Sauvage, J. Schacher, M. Schlötelburg, F. Stocker, M. Swartz, J. Teiger, S.N. Tovey, W.Y. Tsang, M. Valdata-Nappi, V. Vercesi, A.R. Weidberg, M. Wunsch, H. Zaccone

    Research output: Contribution to journalJournal articleResearchpeer-review


    A heuristic model is used to describe data collected by the UA2 experiment at √s = 630 GeV. Distributions of the energy sharing between the leading clusters and the rest of the event are examined. The main features of these distributions can be described by a two-component model with soft, collective interactions dominating at low transverse energy and hard, constituent interactions dominating at high transverse energy. This model provides a simple picture of the emergence of two-jet dominance at SPS pp Collider energies.
    Original languageEnglish
    JournalPhysics Letters B: Particle Physics, Nuclear Physics and Cosmology
    Issue number4-6
    Pages (from-to)441-448
    Publication statusPublished - 1985

    Bibliographical note

    UA2 Collaboration.


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