Observation of vertex factorisation breaking in central pp interactions

D. Barberis, W. Beusch, F. G. Binon, J. N. Carney, D. Di Bari, A. V. Dolgopolov, S. V. Donskov, B. C. Earl, D. Elia, D. Evans, R. Fini, B. R. French, B. Ghidini, S. Inaba, A. V. Inyakin, A. Jacholkowski, G. V. Khaustov, T. Kinashi, J. B. Kinson, A. KirkW. Klempt, M. Kobayashi, A. A. Kondashov, Y. Kulchitsky, A. A. Lednev, V. Lenti, V. A. Lishin, R. A. Loconsole, S. Maljukov, V. Manzari, P. Martinengo, I. Minashvili, T. Nakagawa, F. Navach, K. L. Norman, J. P. Peigneux, S. A. Polovnikov, V. A. Polyakov, Yu D. Prokoshkin, V. Romanovsky, H. Rotscheidt, N. Russakovich, V. D. Samoylenko, A. Semenov, M. Sené, R. Sené, P. M. Shagin, H. Shimizu, A. V. Shtannikov, A. V. Singovsky, A. Solovjev, J. P. Stroot, V. P. Sugonyaev, K. Takamatsu, G. Tchlatchidze, T. Tsuru, G. Vassiliadis, M. Venables, O. Villalobos Baillie, M. F. Votruba, Y. Yasu

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Abstract

Central π+ π- events produced in pp interactions are studied in terms of correlations between the outgoing protons. It is observed there is more ρ0(770) and f2(1270) production in reactions where the outgoing protons are on opposite sides of the beam. This effect is not attributable to the trigger or the experimental acceptance, and suggests that the vertices do not factorise.

Original languageEnglish
Pages (from-to)853-858
Number of pages6
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume388
Issue number4
DOIs
Publication statusPublished - 1996 Nov 28

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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