Electromagnetic Perturbations on πNN and πNN* Couplings in the Chew-Low Model: General Features

Creators: Babu, P.; Frautschi, S.; Thornber, N. S.

Abstract

Electromagnetic perturbations on πNN and πNN* couplings are studied in the N-N* reciprocal bootstrap model. In the present paper we confine ourselves to rather general features, making the linear-D approximation for simplicity. There are several self-consistent coupling shifts, much as in the analogous SU(3) reciprocal bootstrap. It is shown that, except for even-J exchanges in the t channel, the "driving terms" are orthogonal to these self-consistent coupling shifts. Thus, as in the SU(3) case, no simple predictions can be made for coupling shifts in the linear-D approximation.

Additional Information

©1968 The American Physical Society. Received 18 March 1968. One of us (N.S.T.) wishes to thank the American Association of University Women for the Arcadia, California Branch Fellowship (1966-1967) held during part of the work on this project. Thanks for financial support are also extended to the National Science Foundation and the California Institute of Technology. Work supported in part by the U.S. Atomic Energy Commission. Prepared under Contract No. AT(11-1)-68 for the San Francisco Operations Office, U.S. Atomic Energy Commission. [S.F. was an] Alfred P. Sloan Foundation Fellow. [N.S.T. was] [s]upported in part by National Science Foundation Fellowship and by American Association for University Women Fellowship (1966-1967). This paper is based on a thesis submitted by N.S. Thornber to the California Institute of Technology in partial fulfillment of the requirements for the Ph.D. degree.

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