260 citations · 2k across the 44 of their papers we have counts for
5 papers · 1 filter
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…
Infra-Red Finite Charge Propagation
Emili Bagan, Bartomeu Fiol, Martin Lavelle +1
The Coulomb gauge has a long history and many uses. It is especially useful in bound state applications. An important feature of this gauge is that the matter fields have an infra-…
How do constituent quarks arise in QCD? Perturbation theory and the infra-red
E. Bagan, M. Lavelle, D. McMullan +2
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…
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…
Next-to-leading Order Radiative Corrections to the Decay
E. Bagan, Patricia Ball, B. Fiol +1
We calculate the complete corrections to the quark decay taking full account of the quark masses, but neglecting penguin contributions. For a c to the b…