A study of pseudoscalar states produced centrally in pp interactions at 450 GeV/c

• Published in: Physics letters. B Vol. 427; no. 3; pp. 398 - 402
• Main Authors: Barberis, D., Beusch, W., Binon, F.G., Blick, A.M., Close, F.E., Danielsen, K.M., Dolgopolov, A.V., Donskov, S.V., Earl, B.C., Evans, D., French, B.R., Hino, T., Inaba, S., Inyakin, A.V., Ishida, T., Jacholkowski, A., Jacobsen, T., Jones, G.T., Khaustov, G.V., Kinashi, T., Kinson, J.B., Kirk, A., Klempt, W., Kolosov, V., Kondashov, A.A., Lednev, A.A., Lenti, V., Maljukov, S., Martinengo, P., Minashvili, I., Myklebost, K., Nakagawa, T., Norman, K.L., Olsen, J.M., Peigneux, J.P., Polovnikov, S.A., Polyakov, V.A., Romanovsky, V., Rotscheidt, H., Rumyantsev, V., Russakovich, N., Samoylenko, V.D., Semenov, A., Sené, M., Sené, R., Shagin, P.M., Shimizu, H., Singovsky, A.V., Sobol, A., Solovjev, A., Stassinaki, M., Stroot, J.P., Sugonyaev, V.P., Takamatsu, K., Tchlatchidze, G., Tsuru, T., Venables, M., Villalobos Baillie, O., Votruba, M.F., Yasu, Y.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 1998; Elsevier
• Subjects: High Energy Physics - Experiment; Physics
• ISSN: 0370-2693; 1873-2445
• DOI: 10.1016/S0370-2693(98)00403-1

A study has been made of pseudoscalar mesons produced centrally in pp interactions. The results show that the η and η ′ appear to have a similar production mechanism which differs from that of the π 0. The production properties of the η and η ′ are not consistent with what is expected from double Pomeron exchange. In addition the production mechanism for the η and η ′ is such that the production cross section are greatest when the azimuthal angle between the p T vectors of the two protons is 90 degrees.