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QCD Short-distance constraints and hadronic approximations

Bijnens, Johan LU ; Gamiz, E; Lipartia, Edisher LU and Prades, J (2003) In Journal of High Energy Physics
Abstract
This paper discusses a general class of ladder resummation inspired hadronic approximations. It is found that this approach naturally reproduces many successes of single meson per channel saturation models (e.g. VMD) and NJL based models. In particular the existence of a constituent quark mass and a gap equation follows naturally. We construct an approximation that satisfies a large set of QCD short-distance and large N-c constraints and reproduces many hadronic observables. We show how there exists in general a problem between QCD short-distance constraints for Green Functions and those for form factors and cross-sections following from the quark-counting rule. This problem while expected for Green functions that do not vanish in purely... (More)
This paper discusses a general class of ladder resummation inspired hadronic approximations. It is found that this approach naturally reproduces many successes of single meson per channel saturation models (e.g. VMD) and NJL based models. In particular the existence of a constituent quark mass and a gap equation follows naturally. We construct an approximation that satisfies a large set of QCD short-distance and large N-c constraints and reproduces many hadronic observables. We show how there exists in general a problem between QCD short-distance constraints for Green Functions and those for form factors and cross-sections following from the quark-counting rule. This problem while expected for Green functions that do not vanish in purely perturbative QCD also persists for many Green functions that are order parameters. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
1/N expansion, chiral lagrangians, phenomenological models, QCD
in
Journal of High Energy Physics
issue
4: 055
publisher
Springer
external identifiers
  • wos:000183526800055
  • scopus:23044441054
ISSN
1126-6708
DOI
10.1088/1126-6708/2003/04/055
language
English
LU publication?
yes
id
9e7762c8-abd3-461a-a501-d8799c48b6a4 (old id 308507)
date added to LUP
2007-08-24 08:25:04
date last changed
2018-01-14 03:23:08
@article{9e7762c8-abd3-461a-a501-d8799c48b6a4,
  abstract     = {This paper discusses a general class of ladder resummation inspired hadronic approximations. It is found that this approach naturally reproduces many successes of single meson per channel saturation models (e.g. VMD) and NJL based models. In particular the existence of a constituent quark mass and a gap equation follows naturally. We construct an approximation that satisfies a large set of QCD short-distance and large N-c constraints and reproduces many hadronic observables. We show how there exists in general a problem between QCD short-distance constraints for Green Functions and those for form factors and cross-sections following from the quark-counting rule. This problem while expected for Green functions that do not vanish in purely perturbative QCD also persists for many Green functions that are order parameters.},
  author       = {Bijnens, Johan and Gamiz, E and Lipartia, Edisher and Prades, J},
  issn         = {1126-6708},
  keyword      = {1/N expansion,chiral lagrangians,phenomenological models,QCD},
  language     = {eng},
  number       = {4: 055},
  publisher    = {Springer},
  series       = {Journal of High Energy Physics},
  title        = {QCD Short-distance constraints and hadronic approximations},
  url          = {http://dx.doi.org/10.1088/1126-6708/2003/04/055},
  year         = {2003},
}