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Coupled-channels study of the pi- p ---> eta n process

Journal Article · · Physical Review C

http://dx.doi.org/10.1103/PhysRevC.78.025204
The reaction $$\pi^{-}p \to \eta n$$ 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 non-resonant 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 $$\pi^{-}p \to \eta n$$ 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: $$S_{11}(1535)$$, $$S_{11}(1650)$$, $$P_{11}(1440)$$, $$P_{11}(1710)$$, $$P_{13}(1720)$$, $$D_{13}(1520)$$, $$D_{13}(1700)$$, $$D_{15}(1675)$$, and $$F_{15}(1680)$$. The reaction mechanism as well as the predicted $$\eta N$$ scatte

Research Organization:
Thomas Jefferson Lab National Accelerator Facility
Sponsoring Organization:
USDOE
OSTI ID:
955874
Report Number(s):
JLAB-THY-08-812; arXiv:0804.3476; DOE/OR/23177-3727
Journal Information:
Physical Review C, Journal Name: Physical Review C Vol. 78; ISSN 0556-2813; ISSN PRVCAN
Country of Publication:
United States
Language:
English

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