Chromomagnetic screening at high temperature |
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| Authors: | H -Th Elze K Kajantie T Toimela |
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| Institution: | 1. Research Institute for Theoretical Physics, University of Helsinki, SF-00170, Helsinki, Finland
2. Department of Theoretical Physics and Academy of Finland, University of Helsinki, Siltavuorenpenger 20C, SF-00170, Helsinki, Finland
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| Abstract: | Chromomagnetic fields are studied using linear response theory. We show that the spurious pole at |k|≈g 2 T of the static transverse gluon propagator at finite temperature is cancelled, when the full magnetic permeability function is calculated toO(g 2). Consequently the chromomagnetic fields induced by static external perturbations behave regularly and, to this order, similarly to magnetic fields in QED. We further discuss the relevance of this cancellation for perturbative calculations. |
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