7 papers
Effective Quarks and Their Interactions
Emili Bagan, Robin Horan, Martin Lavelle +1
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 t…
Charged Matter: Physics and Renormalisation
Emili Bagan, Martin Lavelle, David McMullan
Descriptions of the ground state in unbroken gauge theories with charged particles are discussed. In particular it is shown that the on-shell Green's functions and S-matrix element…
Asymptotic Dynamics in Quantum Field Theory - When does the coupling switch off?
Robin Horan, Martin Lavelle, David McMullan
We discuss the approach to asymptotic dynamics due to Kulish and Faddeev. We show that there are problems in applying this method to theories with four point interactions. The sour…
Colour Charges and Anti-Screening
Emili Bagan, Robin Horan, Martin Lavelle +1
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,…
Construction and Consequences of Coloured Charges in QCD
E. Bagan, M. Lavelle, D. McMullan +2
This talk reports on work aimed at improving our understanding of charged states in gauge theories.Emphasis is placed on different ways of implementingthe gauge invariance of physi…
Constituent Quarks from QCD: Perturbation Theory and the Infra-red
E. Bagan, M. Lavelle, D. McMullan +2
Systematic approaches to building up gauge invariant descriptions of charged fields, such as electrons or quarks, are described. Physically relevant descriptions must then be singl…