Infrared behavior and fixed points in Landau-gauge QCD
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(Published version)
Date
2004
Authors
Pawlowski, Jan M.
Litim, Daniel F.
Nedelko, Sergei N.
von Smekal, Lorenz Johann Maria
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Journal article
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Physical Review Letters, 2004; 93(15):152002
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Jan M. Pawlowski, Daniel F. Litim, Sergei Nedelko, and Lorenz von Smekal
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Abstract
We investigate the infrared behavior of gluon and ghost propagators in Landau-gauge QCD by means of an exact renormalization group equation. We explain how, in general, the infrared momentum structure of Green functions can be extracted within this approach. An optimization procedure is devised to remove residual regulator dependences. In Landau-gauge QCD this framework is used to determine the infrared leading terms of the propagators. The results support the Kugo-Ojima confinement scenario. Possible extensions are discussed.
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School of Chemistry and Physics : Physics and Mathematical Physics
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©2004 American Physical Society