The glue around quarks and the interquark potential (original) (raw)
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The Origin of the Color Charge into Quarks
Journal of High Energy Physics, Gravitation and Cosmology
Showing the origin of the mass in an additional coupling between field quantum oscillators, we formulate a hypothesis of a geometrical structure of the oscillators of "fields-particles". In this way, we define the possible structure of quarks and hadrons (as the proton). This hypothesis is reasonable if one admits field oscillators composed by sub-oscillators at semi-quantum (IQuO) and in which a degree of internal freedom is definable. Using the IQuO model, we find the origin of the sign of electric charge in to particles and, in quarks, the isospin, the strangeness and colour charge. Finally, we formulate the structure of the gluons and the variation modality of the colour charge in quarks.
Colour charges and the anti-screening contribution to the interquark potential
Physics Letters B, 1998
Asymptotic freedom arises from the dominance of anti-screening over screening in non-abelian gauge theories. In this paper we will present a simple and physically appealing derivation of the anti-screening contribution to the interquark potential. Our method allows us to identify the dominant gluonic distribution around static quarks. Extensions are discussed.
1996
It is shown that colour can only be defined on gauge invariant states. Since the ability to associate colour with constituent quarks is an integral part of the constituent quark model, this means that, if we want to extract constituent quarks from QCD, we need to dress Lagrangian quarks with gluons so that the result is gauge invariant. We further prove that gauge fixings can be used to construct such dressings. Gauge invariant dressed quark states are presented and a direct approach to the interquark potential is discussed. Some further aspects of dressing quarks are briefly discussed.
Physics Reports, 1997
Starting from the observation that colour charge is only well defined on gauge invariant states, we construct perturbatively gauge invariant, dynamical dressings for individual quarks. Explicit calculations show that an infra-red finite mass-shell renormalisation of the gauge invariant, dressed propagator is possible and, further, that operator product effects, which generate a running mass, may be included in a gauge invariant way in the propagator. We explain how these fields may be combined to form hadrons and show how the interquark potential can now be directly calculated. The onset of confinement is identified with an obstruction to building a non-perturbative dressing. We propose several methods to extract the hadronic scale from the interquark potential. Various extensions are discussed.
Colour Charges and Anti-Screening
1998
If constituent quarks are to emerge from QCD they must have well defined colour and be energetically favoured. After reviewing the general properties of charges in gauge theories, a method for constructing charges is presented and applied to the infra-red structure of the theory and to the interquark potential. Both of these applications supply a physical interpretation of the structures found in the construction of charges. We will see that constituent structures arise in QCD.
Color" as a classification symmetry and quark charges
Physical Review D, 1976
We discuss the problem of defining a residual global symmetry for classification purposes in the context of a spontaneously broken gauge theory of strong, weak, and electromagnetic interactions, where strong interactions are associated with a local color SU(3)' group. We show that a weakly broken SU(3), [different from but related to SU(3)'] can always be realized as a good classification symmetry for a class of models with integer-charge quarks and massive gluons. For fractionally charged quark models, the symmetry SU(3)c is exact even for massive gluons, only if the full theory contains an Abelian U(1) symmetry associated with electric charge. If there is no such U(1) symmetry in the theory, and we wish to preserve a three-color classification symmetry in the fractionally charged quark model, then the gluons must be left massless.
Effective Quarks and Their Interactions
Eprint Arxiv Hep Th 0004091, 2000
This talk will summarise the progress we have made in our programme to both characterise and construct charges in gauge theories. As an application of these ideas we will see how the dominant glue surrounding quarks, which is responsible for asymptotic freedom, emerges from a constituent description of the interquark potential.
How do constituent quarks arise in QCD? Perturbation theory and the infra-red
Nuclear Physics B - Proceedings Supplements, 1997
We motivate the use of dressed charges by arguing that such objects are needed to describe, e.g., constituent quarks and, in general, physical charged states in gauge theories. We give a short introduction to dressings in both QED and QCD. We put special emphasis on the infra-red properties of a moving dressed charge. To be more precise, we demonstrate that the one loop propagator of a relativistic dressed charge can be renormalized in the mass shell scheme with no infra-red divergence showing up.
PLY-MS-98-11 Colour Charges and the Anti-Screening Contribution to the Interquark Potential
1998
Abstract: Asymptotic freedom arises from the dominance of anti-screening over screening in non-abelian gauge theories. In this paper we will present a simple and physically appealing derivation of the anti-screening contribution to the interquark potential. Our method allows us to identify the dominant gluonic distribution around static quarks. Extensions are discussed. 1