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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58 Scopus citations


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
Issue number1
Publication statusPublished - Jul 2005


ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Nuclear and High Energy Physics

Cite this

Prakhov, S., Nefkens, B. M. K., Allgower, C. E., Arndt, R. A., Bekrenev, V., Briscoe, W. J., ... Workman, R. L. (2005). Measurement of π-p→ηn from threshold to pπ-=747MeV/c. Physical Review C - Nuclear Physics, 72(1), [015203].