---
res:
bibo_abstract:
- We give a detailed account on the application of the Schwinger variational principle
(SchVP) for the evaluation of operator Pade approximates (OPA's). OPA's can be
considered in their simplest ''one-loop'' (ladder) form as solutions of scattering
equations but allow for a more natural transition to quantum field theory beyond
ladder approximation. Therefore methods for their evaluation are of high interest. One
of these methods is the SchVP which we study in the special case of elastic nucleon-nucleon
scattering in terms of the Blankenbecler-Sugar equation. Since exact proofs of
convergence for the SchVP cannot be found in general, the intention of our paper
is to give by a detailed study of this complex example a justification for the
application of the SchVP in even more complex situations. Applying the SchVP,
it is shown that relatively simple and quite precise approximations for the T-matrix
elements can be constructed valid for the whole energy range under consideration.@eng
bibo_authorlist:
- autoren_ansetzung:
- Fleischer, Jochem
- Fleischer
- Jochem Fleischer
- Fleischer, J
- Fleischer, J.
- J Fleischer
- J. Fleischer
foaf_Person:
foaf_givenName: Jochem
foaf_name: Fleischer, Jochem
foaf_surname: Fleischer
foaf_workInfoHomepage: http://www.librecat.org/personId=40323
- autoren_ansetzung:
- PINDOR, M
- PINDOR
- M PINDOR
- PINDOR, M
- PINDOR, M.
- M PINDOR
- M. PINDOR
foaf_Person:
foaf_givenName: M
foaf_name: PINDOR, M
foaf_surname: PINDOR
bibo_issue: '11'
bibo_volume: '25'
dct_date: 1994^xs_gYear
dct_identifier:
- UT:A1994PV88000002
dct_isPartOf:
- http://id.crossref.org/issn/0587-4254
dct_language: eng
dct_publisher: POLISH ACAD SCIENCES INST PHYSICS@
dct_title: SCHWINGER VARIATIONAL PRINCIPLE IN SCATTERING-THEORY@
...