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Effective field theory approach to parton-hadron conversion in high energy QCD processes
A QCD based effective action is constructed to describe the dynamics of confinement and symmetry breaking in the process of parton-hadron conversion. The deconfined quark and gluon degrees of freedom of the perturbative QCD vacuum are coupled to color singlet collective fields representing the non-p...
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Lenguaje: | eng |
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1994
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Acceso en línea: | https://dx.doi.org/10.1103/PhysRevD.51.3669 http://cds.cern.ch/record/268587 |
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author | Kinder-Geiger, Klaus |
author_facet | Kinder-Geiger, Klaus |
author_sort | Kinder-Geiger, Klaus |
collection | CERN |
description | A QCD based effective action is constructed to describe the dynamics of confinement and symmetry breaking in the process of parton-hadron conversion. The deconfined quark and gluon degrees of freedom of the perturbative QCD vacuum are coupled to color singlet collective fields representing the non-perturbative vacuum with broken scale and chiral symmetry. The effective action recovers QCD with its scale and chiral symmetry properties at short space-time distances, but yields at large distances (r > 1 fm) to the formation of symmetry breaking gluon and quark condensates. The approach is applied to the evolution of a fragmenting q\bar q pair with its generated gluon distribution, starting from a large hard scale Q^2. The modification of the gluon distribution arising from the coupling to the non-perturbative collective field results eventually in a complete condensation of gluons. Color flux tube configurations of the gluons in between the q\bar q pair are obtained as solutions of the equations of motion. With reasonable parameter choice, the associated energy per unit length (string tension) comes out \simeq 1 GeV/fm, consistent with common estimates. |
id | cern-268587 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 1994 |
record_format | invenio |
spelling | cern-2685872019-09-30T06:29:59Zdoi:10.1103/PhysRevD.51.3669http://cds.cern.ch/record/268587engKinder-Geiger, KlausEffective field theory approach to parton-hadron conversion in high energy QCD processesParticle Physics - TheoryA QCD based effective action is constructed to describe the dynamics of confinement and symmetry breaking in the process of parton-hadron conversion. The deconfined quark and gluon degrees of freedom of the perturbative QCD vacuum are coupled to color singlet collective fields representing the non-perturbative vacuum with broken scale and chiral symmetry. The effective action recovers QCD with its scale and chiral symmetry properties at short space-time distances, but yields at large distances (r > 1 fm) to the formation of symmetry breaking gluon and quark condensates. The approach is applied to the evolution of a fragmenting q\bar q pair with its generated gluon distribution, starting from a large hard scale Q^2. The modification of the gluon distribution arising from the coupling to the non-perturbative collective field results eventually in a complete condensation of gluons. Color flux tube configurations of the gluons in between the q\bar q pair are obtained as solutions of the equations of motion. With reasonable parameter choice, the associated energy per unit length (string tension) comes out \simeq 1 GeV/fm, consistent with common estimates.hep-ph/9409308CERN-TH-7440-94oai:cds.cern.ch:2685871994-09-14 |
spellingShingle | Particle Physics - Theory Kinder-Geiger, Klaus Effective field theory approach to parton-hadron conversion in high energy QCD processes |
title | Effective field theory approach to parton-hadron conversion in high energy QCD processes |
title_full | Effective field theory approach to parton-hadron conversion in high energy QCD processes |
title_fullStr | Effective field theory approach to parton-hadron conversion in high energy QCD processes |
title_full_unstemmed | Effective field theory approach to parton-hadron conversion in high energy QCD processes |
title_short | Effective field theory approach to parton-hadron conversion in high energy QCD processes |
title_sort | effective field theory approach to parton-hadron conversion in high energy qcd processes |
topic | Particle Physics - Theory |
url | https://dx.doi.org/10.1103/PhysRevD.51.3669 http://cds.cern.ch/record/268587 |
work_keys_str_mv | AT kindergeigerklaus effectivefieldtheoryapproachtopartonhadronconversioninhighenergyqcdprocesses |