Measurement of π-p→ηn from threshold to pπ-=747MeV/c

S. Prakhov, B. M K Nefkens, C. E. Allgower, R. A. Arndt, V. Bekrenev, W. J. Briscoe, M. Clajus, J. R. Comfort, K. Craig, D. Grosnick, D. Isenhower, N. Knecht, D. Koetke, A. Koulbardis, N. Kozlenko, S. Kruglov, G. Lolos, I. Lopatin, D. M. Manley, R. ManweilerA. Marua, S. McDonald, J. Olmsted, Z. Papandreou, D. Peaslee, N. Phaisangittisakul, J. W. Price, A. F. Ramirez, M. Sadler, A. Shafi, H. Spinka, T. D S Stanislaus, A. Starostin, H. M. Staudenmaier, I. I. Strakovsky, I. Supek, W. B. Tippens, R. L. Workman

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Abstract

The differential cross section for η production in reaction π-p→ηn has been measured over the full angular range at seven incident π- beam momenta from threshold to pπ-=747 MeV/c using the Crystal Ball multiphoton spectrometer. The angular distributions are S wave dominated. At 10 MeV/c above threshold, a small D-wave contribution appears that interferes with the main S wave. The total η production cross section σtot is obtained by integration of dσ/dΩ. Starting at threshold, σtot rises rapidly, as expected for S-wave-dominated production. The features of the π-p→ηn cross section are strikingly similar to those of the SU(3) flavor-related process K-p→ηΛ. Comparison of the π-p→ηn reaction is made with η photoproduction.

Original languageEnglish (US)
Article number015203
JournalPhysical Review C - Nuclear Physics
Volume72
Issue number1
DOIs
StatePublished - Jul 2005

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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