Dynamical mass generation in Landau gauge QCD



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Llanes Estrada, Felipe José and Fischer, C. S. and Alkofer, R. (2005) Dynamical mass generation in Landau gauge QCD. Nuclear Physics B-Proceedings Supplements, 141 . pp. 128-133. ISSN 0920-5632

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Official URL: http://dx.doi.org/10.1016/j.nuclphysbps.2004.12.020


We summarise results on the infrared behaviour of Landau gauge QCD from the Green's functions approach and lattice calculations. Approximate, nonperturbative solutions for the ghost, gluon and quark propagators as well as first results for the quark-gluon vertex from a coupled set of Dyson-Schwinger equations are compared to quenched and unquenched lattice results. Almost quantitative agreement is found for all three propagators. Similar effects of unquenching are found in both approaches. The dynamically generated quark masses are close to 'phenomenological' values. First results for the quark-gluon vertex indicate a complex tenser structure of the non-perturbative quark gluon interaction.

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© 2004 Elsevier B.V. All rights reserved.
We are grateful to M. Bhagwat, H. Gies, C. Roberts, J. Skullerud, P. Tandy, A. Williams, and D. Zwanziger for helpful discussions. This work has been supported by the Deutsche Forschungsgemeinschaft (DFG) under contracts Al 279/3-3, Al 279/3-4, Fi 970/2-1 and GRK683. F.L. thanks the German DAAD and Univ. Complutense for support and the members of the Institute for Theoretical Physics of the University of T¨ubingen for their hospitality during his visit, when the project reported in section 4 has been started. We thank A. Kizilers¨u, A. Thomas and A. Williams for the organisation of this exceptional conference QCD DOWN UNDER.
Workshop on Quantum Chromodynamics (2004. Adelaide, Australia)

Uncontrolled Keywords:Dyson-Schwinger Equations, Infrared Behavior, Confinement, Exponents
Subjects:Sciences > Physics
ID Code:24342
Deposited On:23 Jan 2014 19:48
Last Modified:31 Dec 2020 00:02

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