Do Instantons Like a Colorful Background?

Details Do Instantons Like a Colorful Background? Do Instantons Like a Colorful Background?

2006-08-15

arxiv.org/abs/hep-ph/0608171v1

Eur.Phys.J.C49:997-1010,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

25 pages, 7 figures

Scientific paper

10.1140/epjc/s10052-006-0178-2

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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