The ep -->e'p eta reaction at and above the S11(1535) baryon resonance.
Phys Rev Lett
; 86(9): 1702-6, 2001 Feb 26.
Article
em En
| MEDLINE
| ID: mdl-11290228
ABSTRACT
New cross sections for the reaction e p-->e p eta 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 eta N coupling strengths of baryon resonances. Newly observed structure at W approximately 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.
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01-internacional
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MEDLINE
Idioma:
En
Revista:
Phys Rev Lett
Ano de publicação:
2001
Tipo de documento:
Article