eta PRODUCTION IN PROTON-PROTON COLLISIONS AT 72 MeV EXCESS ENERGY

H. Pettersson, M. Bashkanov, D. Bogoslowsky, H. Calen, H. Clement, C. Ekstrom, K. Fransson, L. Gustafsson, B. Hoistad, G. Ivanov, M. Jacewicz, E. Jiganov, T. Johansson, S. Keleta, O. Khakimova, I. Koch, F. Kren, S. Kullander, A. Kupsc, A. KuznetsovP. Marciniewski, R. Meier, B. Morosov, C. Pauly, Y. Petukhov, A. Povtorejko, R. J. M. Y. Ruber, K. Schonning, W. Scobel, B. Shwartz, T. Skorodko, V. Sopov, J. Stepaniak, P. Thorngren-Engblom, V. Tikhomirov, A. Turowiecki, G. J. Wagner, M. Wolke, A. Yamamoto, J. Zabierowski, J. Zlomanczuk

Research output: Contribution to journalArticlepeer-review

Abstract

The production of eta mesons at an excess energy of 72 MeV has been studied in the reaction pp -> pp(eta)gamma gamma. It is shown that a simple model with Pp. final states included reproduces observed differential distributions better than the same model restricted to Ss, Sd and Ds final states. The strong influence of the Pp states could be taken as an indication of rho dominance within an one boson exchange model for the excitation of N*(1535).

Original languageEnglish
Pages (from-to)446-449
Number of pages4
JournalInternational Journal of Modern Physics A
Volume24
Issue number2-3
Publication statusPublished - 30 Jan 2009
EventConference MESON 2008 - Cracow, Poland
Duration: 6 Jun 200810 Jun 2008

Keywords

  • Eta meson
  • near-threshold production

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