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Consistent effective description of nucleonic resonances in an unitary relativistic field-theoretic way | F. Kleefeld
; | Date: |
10 Nov 1998 | Journal: | Vol. I of Proc. XIV Int. Seminar on High Energy Physics Problems, "Relativistic Nuclear Physics and Quantum Chromodynamics" (ISHEPP 98), 17-22.8.1998, Dubna, Russia, p. 69-77 (Eds. A.M. Baldin, V.V. Burov, ISBN 5-85165-570-4, (c) JINR, Dubna, | Subject: | nucl-th | Abstract: | High energy strong interaction physics is successfully described by the local renormalizable gauge theory called Quantum-Chromo-Dynamics (QCD) with quarks and gluons as ``elementary’’ degrees of freedom, while intermediate energy strong interaction physics shows up to be determined by a non-local, non--renormalizable effective field theory (EFT) of ``effective’’ degrees of freedom like mesons, ground state baryons and resonances. Within the picture of an effective field theory of strong interaction at intermediate energies I present a ``toy-model’’ in which fermionic and bosonic resonances are considered to be ``particles’’, i.e. they consistently are described by (anti-)commuting effective field-operators (containing dynamics of infinitely many quark-gluon or meson-nucleon diagrams) which are comfortably treated by Wick’s Theorem in a covariant framework and obey unitarity. Non-trivial implications to couplings of non-local interactions are shown. | Source: | arXiv, nucl-th/9811032 | Services: | Forum | Review | PDF | Favorites |
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