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Light-cone Yang-Mills mechanics: SU(2) vs. SU(3)

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Abstract

We investigate the light-cone SU(n) Yang-Mills mechanics formulated as the leading order of the long-wavelength approximation to the light-front SU(n) Yang-Mills theory. In the framework of the Dirac formalism for degenerate Hamiltonian systems, for models with the structure groups SU(2) and SU(3), we determine the complete set of constraints and classify them. We show that the light-cone mechanics has an extended invariance: in addition to the local SU(n) gauge rotations, there is a new local two-parameter Abelian transformation, not related to the isotopic group, that leaves the Lagrangian system unchanged. This extended invariance has one profound consequence. It turns out that the light-cone SU(2) Yang-Mills mechanics, in contrast to the well-known instant-time SU(2) Yang-Mills mechanics, represents a classically integrable system. For calculations, we use the technique of Gröbner bases in the theory of polynomial ideals.

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Correspondence to V. P. Gerdt.

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Translated from Teoreticheskaya i Matematicheskaya Fizika, Vol. 155, No. 1, pp. 62–73, April, 2008.

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Gerdt, V.P., Palii, Y.G. & Khvedelidze, A.M. Light-cone Yang-Mills mechanics: SU(2) vs. SU(3). Theor Math Phys 155, 557–566 (2008). https://doi.org/10.1007/s11232-008-0046-3

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