Roper resonances and generator coordinate method in the chiral-soliton model
- 1 April 1989
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review D
- Vol. 39 (7) , 1903-1912
- https://doi.org/10.1103/physrevd.39.1903
Abstract
The nucleon and Δ Roper resonances are described by means of the generator coordinate method in the framework of the nontopological chiral-soliton model. Solitons with various sizes are constructed with a constrained variational technique. The masses of all known Roper resonances come out to within 150 MeV of their experimental values. A nucleon compression modulus of about 4 GeV is extracted. The limits of the approach due to the polarization of the Dirac vacuum are displayed.Keywords
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