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Title: Quark-partons and constituent quarks

Abstract

The question of the existence inside a hadron of bare quark-partons, as well as dressed constituent quarks is discussed. The existence of the first follows from the experimental results on deep inelastic scattering of leptons on nucleons, and the second from the data on the production of fast particles with small transverse momenta in hadron-nucleus collisions. It is shown that QCD effects, which cause the quark mass to depend on its virtuality Q/sup 2/, may be responsible for the transformation of the small current-quark masses at Qapprox.10 GeV into large constituent-quark masses at Qapprox.M/sub q/ = 300--500 MeV. Interpreting the constituent quark as a complicated system which consists of a valence quark-parton, a sea of quark-antiquark pairs, and gluons enables one to understand the non-exponential behavior of the differential cross section of hadron elastic scattering at small Vertical BartVertical Bar. The fact that a constituent quark is small compared to a nucleon is apparently evidence for the presence of two confinement radii, one for the sea and one for valence quark-partons. This is probably connected with the presence of some massive objects like gluonium in the theory.

Authors:
Publication Date:
Research Org.:
Leningrad Institute of Nuclear Physics, USSR Academy of Sciences
OSTI Identifier:
5910936
Resource Type:
Journal Article
Journal Name:
Sov. J. Nucl. Phys. (Engl. Transl.); (United States)
Additional Journal Information:
Journal Volume: 33:3
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; PARTON MODEL; DEEP INELASTIC SCATTERING; QUARK MODEL; GLUONS; QUARKS; MASS; VALENCE; QUANTUM CHROMODYNAMICS; TRANSVERSE MOMENTUM; COMPOSITE MODELS; ELEMENTARY PARTICLES; FIELD THEORIES; INELASTIC SCATTERING; INTERACTIONS; LEPTON-BARYON INTERACTIONS; LEPTON-HADRON INTERACTIONS; LEPTON-NUCLEON INTERACTIONS; LINEAR MOMENTUM; MATHEMATICAL MODELS; PARTICLE INTERACTIONS; PARTICLE MODELS; POSTULATED PARTICLES; QUANTUM FIELD THEORY; SCATTERING; 645204* - High Energy Physics- Particle Interactions & Properties-Theoretical- Strong Interactions & Properties

Citation Formats

Shekhter, V M. Quark-partons and constituent quarks. United States: N. p., 1981. Web.
Shekhter, V M. Quark-partons and constituent quarks. United States.
Shekhter, V M. Sun . "Quark-partons and constituent quarks". United States.
@article{osti_5910936,
title = {Quark-partons and constituent quarks},
author = {Shekhter, V M},
abstractNote = {The question of the existence inside a hadron of bare quark-partons, as well as dressed constituent quarks is discussed. The existence of the first follows from the experimental results on deep inelastic scattering of leptons on nucleons, and the second from the data on the production of fast particles with small transverse momenta in hadron-nucleus collisions. It is shown that QCD effects, which cause the quark mass to depend on its virtuality Q/sup 2/, may be responsible for the transformation of the small current-quark masses at Qapprox.10 GeV into large constituent-quark masses at Qapprox.M/sub q/ = 300--500 MeV. Interpreting the constituent quark as a complicated system which consists of a valence quark-parton, a sea of quark-antiquark pairs, and gluons enables one to understand the non-exponential behavior of the differential cross section of hadron elastic scattering at small Vertical BartVertical Bar. The fact that a constituent quark is small compared to a nucleon is apparently evidence for the presence of two confinement radii, one for the sea and one for valence quark-partons. This is probably connected with the presence of some massive objects like gluonium in the theory.},
doi = {},
journal = {Sov. J. Nucl. Phys. (Engl. Transl.); (United States)},
number = ,
volume = 33:3,
place = {United States},
year = {1981},
month = {3}
}