Pion-nucleon phase shifts in heavy baryon chiral perturbation theory
- Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011 (United States)
- Department of Physics and Astronomy, University of Hawaii at Manoa, Honolulu, Hawaii 96822 (United States)
We calculate the phase shifts in pion-nucleon scattering using the heavy baryon formalism. We consider phase shifts for the pion energy range of 140 to 200 MeV. We employ two different methods for calculating the phase shifts{emdash}the first using the full third order calculation of the pion-nucleon scattering amplitude and the second by including the resonances {Delta} and N{sup *} as explicit degrees of freedom in the Lagrangian. We compare the results of the two methods with phase shifts extracted from fits to the pion-nucleon scattering data. We find good to fair agreement between the calculations and the phase shifts from scattering data. {copyright} {ital 1997} {ital The American Physical Society}
- DOE Contract Number:
- FG02-92ER40730; FG03-94ER40833
- OSTI ID:
- 542776
- Journal Information:
- Physical Review, D, Journal Name: Physical Review, D Journal Issue: 7 Vol. 56; ISSN PRVDAQ; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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