Coupled-channels study of the {pi}{sup -}p{yields}{eta}n process
- Institut de Recherche sur les lois Fondamentales de l'Univers, DSM/IRFU, CEA/Saclay, F-91191 Gif-sur-Yvette (France)
- Departament d'Estructura i Constituents de la Materia and Institut de Ciencies del Cosmos, Universitat de Barcelona, E-08028 Barcelona (Spain)
- Excited Baryon Analysis Center (EBAC), Thomas Jefferson National Accelerator Facility, Newport News, Virginia 22901 (United States)
The reaction {pi}{sup -}p{yields}{eta}n is investigated within a dynamical coupled-channels model of meson production reactions in the nucleon resonance region. The meson baryon channels included are {pi}N,{eta}N,{pi}{delta},{sigma}N, and {rho}N. The nonresonant meson-baryon interactions of the model are derived from a set of Lagrangians by using a unitary transformation method. One or two excited nucleon states in each of S,P,D, and F partial waves are included to generate the resonant amplitudes. Data of the {pi}{sup -}p{yields}{eta}n reaction from threshold up to a total center-of-mass energy of about 2 GeV are satisfactorily reproduced and the roles played by the following nine nucleon resonances are investigated: S{sub 11}(1535),S{sub 11}(1650),P{sub 11}(1440),P{sub 11}(1710),P{sub 13}(1720),D{sub 13}(1520),D{sub 13}(1700),D{sub 15} (1675), and F{sub 15}(1680). The reaction mechanism and the predicted {eta}N scattering length are discussed.
- OSTI ID:
- 21192139
- Journal Information:
- Physical Review. C, Nuclear Physics, Vol. 78, Issue 2; Other Information: DOI: 10.1103/PhysRevC.78.025204; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
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