Coupled-channels study of the {pi}{sup -}p {right arrow} {eta}n process.
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.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC); Japanese Society for the Promotion of Science
- DOE Contract Number:
- DE-AC02-06CH11357
- OSTI ID:
- 940210
- Report Number(s):
- ANL/PHY/JA-61648; PRVCAN; TRN: US0807048
- Journal Information:
- Phys. Rev. C, Vol. 78, Issue Aug. 2008; ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- ENGLISH
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