Phys. Rev. Lett. 86, 1702 - 1706 (2001)

The epepη Reaction at and above the S11(1535) Baryon Resonance

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R. Thompson et al. (The CLAS Collaboration)
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Received 8 November 2000

New cross sections for the reaction epepη are reported for total center of mass energy W  =  1.5–1.86 GeV and invariant momentum transfer Q2  =  0.25–1.5 (GeV/c)2. This large kinematic range allows extraction of important new information about response functions, photocouplings, and ηN coupling strengths of baryon resonances. Newly observed structure at W∼1.65 GeV is shown to come from interference between S and P waves and can be interpreted with known resonances. Improved values are derived for the photon coupling amplitude for the S11(1535) resonance.


©2001 The American Physical Society

URL: http://link.aps.org/abstract/PRL/v86/p1702
DOI: 10.1103/PhysRevLett.86.1702
PACS: 13.60.Le, 13.30.Eg, 14.20.Gk

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