Exclusive η production in pp reactions

I. Fröhlich, F. Balestra, Y. Bedfer, R. Bertini, L. C. Bland, A. Brenschede, F. Brochard, M. P. Bussa, Seonho Choi, M. L. Colantoni, R. Dressler, M. Dzemidzic, J. Cl Faivre, A. Ferrero, L. Ferrero, J. Foryciarz, V. Frolov, R. Garfagnini, A. Grasso, S. HeinzW. W. Jacobs, W. Kühn, A. Maggiora, M. Maggiora, A. Manara, D. Panzieri, H. W. Pfaff, G. Piragino, A. Popov, J. Ritman, P. Salabura, V. Tchalyshev, F. Tosello, S. E. Vigdor, G. Zosi

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Angular distributions for the exclusive reaction pp → ppη observed via the π +π -π 0 decay channel have been measured at T beam = 2.15 GeV, 2.50 GeV and 2.85 GeV (excess energies Q = 324 MeV, 412 MeV and 554 MeV). The polar angle of the η shows an anisotropy with respect to the beam direction for the lowest energy, which vanishes for the higher energies. The anisotropy of the pp polar angle increases slightly with the beam energy.

Original languageEnglish (US)
Pages (from-to)331-334
Number of pages4
JournalEuropean Physical Journal A
Issue number2-3
StatePublished - Oct 1 2003
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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    Fröhlich, I., Balestra, F., Bedfer, Y., Bertini, R., Bland, L. C., Brenschede, A., Brochard, F., Bussa, M. P., Choi, S., Colantoni, M. L., Dressler, R., Dzemidzic, M., Faivre, J. C., Ferrero, A., Ferrero, L., Foryciarz, J., Frolov, V., Garfagnini, R., Grasso, A., ... Zosi, G. (2003). Exclusive η production in pp reactions. European Physical Journal A, 18(2-3), 331-334. https://doi.org/10.1140/epja/i2002-10229-y