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Physics Letters B 467 (1999) 165-170
Experimental evidence for a vector-like behaviour of Pomeron exchange
D. Barberis, F. Binon, F E. Close, K M. Danielsen, S V. Donskov, B C. Earl, D. Evans, B R. French, T. Hino, S. Inaba, A. Jacholkowski, T. Jacobsen, G V. Khaustov, J B. Kinson, A. Kirk, A A. Kondashov, A A. Lednev, V. Lenti, I. Minashvili, J P. Peigneux1, V. Romanovsky, N. Rusakovitch, A. Semenov, P M. Shagin, H. Shimizu, A V. Singovsky1, A E. Sobol, M. Stassinaki, J P. Stroot, K. Takamatsu, T. Tsuru, O. Villalobos Baillie, M F. Votruba, Y. Yasu
WA102 Collaboration(s)

Evidence is presented that the Pomeron act as a non-conserved vector current. A study has been made of the azimuthal angle phi, which is defined as the angle between the pT vectors of the two outgoing protons, in the reaction pp -> pp(X0) for those resonances (X0) which are compatible with being produced by double Pomeron exchange. These distributions have been compared with a model which describes the Pomeron as a non-conserved vector current and a qualitative agreement is found. In addition, when one of the particles exchanged is known to have spin 0, namely pi-Pomeron exchange, the phi distribution is flat.
1 :  LAPP - Laboratoire d'Annecy le Vieux de Physique des Particules
Physique/Physique des Hautes Energies - Expérience
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