Do instantons like a colorful background? |
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Authors: | H Gies J Jaeckel JM Pawlowski C Wetterich |
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Institution: | (1) Institut fuer Theoretische Physik, Philosophenweg 16, 69120 Heidelberg, Germany;(2) Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany |
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Abstract: | We investigate chiral symmetry breaking and color symmetry breaking in QCD. The effective potential of the corresponding scalar
condensates is discussed in the presence of non-perturbative contributions from the semiclassical one-instanton sector. We
concentrate on a color singlet scalar background which can describe chiral condensation, as well as a color octet scalar background
which can generate mass for the gluons. Whereas a non-vanishing singlet chiral field is favored by the instantons, we have
found no indication for a preference of color octet backgrounds. |
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Keywords: | |
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