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Unquenching the Quark-Antiquark Green’s Function.
- Source :
-
Few-Body Systems . Oct2004, Vol. 35 Issue 3-4, p99-115. 17p. - Publication Year :
- 2004
-
Abstract
- We propose a nonperturbative resummation scheme for the four-point connected quark-antiquark Green’s functionG4 that shows how the Bethe-Salpeter equation may be “unquenched” with respect to quark-antiquark loops. This mechanism allows to dynamically account for hadronic meson decays and multiquark structures whilst respecting the underlying symmetries. An initial approximation to the four-point Schwinger-Dyson equation - suitable for phenomenological application - is examined numerically in a couple of aspects. It is demonstrated that this approximation explicitly maintains the correct asymptotic limits and contains the physical resonance structures in the near timelike region in the quark-antiquark channel. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 01777963
- Volume :
- 35
- Issue :
- 3-4
- Database :
- Academic Search Index
- Journal :
- Few-Body Systems
- Publication Type :
- Academic Journal
- Accession number :
- 15332500
- Full Text :
- https://doi.org/10.1007/s00601-004-0063-1