Gauge-invariant soft modes in Yang-Mills theory

Details Gauge-invariant soft modes in Yang-Mills theory Gauge-invariant soft modes in Yang-Mills theory

2007-05-27

arxiv.org/abs/0705.3947v1

Int.J.Mod.Phys.E16:2789-2793,2007

Physics

High Energy Physics

High Energy Physics - Theory

4 pages

Scientific paper

10.1142/S0218301307008410

A gauge-invariant saddle point expansion for the Yang-Mills vacuum transition amplitude on the basis of the squeezed approximation to the vacuum wave functional is outlined. This framework allows the identification of gauge-invariant infrared degrees of freedom which arise as dominant sets of gauge field orbits and provide the principal input for an essentially analytical treatment of soft amplitudes. The analysis of the soft modes sheds new light on how vacuum fields organize themselves into collective excitations and yields a gauge-invariant representation of instanton and meron effects as well as a new physical interpretation for Faddeev-Niemi knots.

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