Do Instantons Like a Colorful Background?

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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.
25 pages, 7 figures

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High Energy Physics - Phenomenology

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http://salesiana.dossiersoluciones.com/handle/123456789/181787

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/hep-ph/0608171
 http://arxiv.org/abs/hep-ph/0608171
 Eur.Phys.J.C49:997-1010,2007
 doi:10.1140/epjc/s10052-006-0178-2

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arXiv