Measurement of pi- p ---> eta n from threshold to p (pi-) = 747-MeV/c - INSPIRE

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Measurement of pi- p ---> eta n from threshold to p (pi-) = 747-MeV/c

Jul, 2005

Published in:

Phys.Rev.C 72 (2005) 015203

DOI:

10.1103/PhysRevC.72.015203

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Abstract: (APS)

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.

25.80.Hp
25.40.Ve
13.75.-n

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Figures(0)

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