منابع مشابه
Obtaining gluon propagator with Leibbrandt–Mandelstam prescription
The quantization problems of the gluon fields are investigated in the lightcone gauge, nμAμ(x) = 0, where n2 = 0. In this gauge, the gluon propagator has unphysical poles of kind 1/(nk). In order to remove these singularities, Leibbrandt and Mandelstam have proposed a new prescription. In this work we introduced a new modified lightcone gauge, which is ( nμ + iε (n∗k)k2 kμ ) Aμ = 0 where n∗μ is...
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We find the exact non-perturbative expression for a simple Wilson loop of arbitrary shape for U(N) and SU(N) Euclidean or Minkowskian twodimensional Yang-Mills theory (YM2) regulated by the Wu-MandelstamLeibbrandt gauge prescription. The result differs from the standard pure exponential area-law of YM2, but still exhibits confinement as well as invariance under area-preserving diffeomorphisms a...
متن کاملThe Mandelstam–Leibbrandt prescription and the Discretized Light Front Quantization
It is shown that the quantization of the unphysical degrees of freedom, which leads to the Mandelstam–Leibbrandt prescription for the infrared spurious singularities in the continuum light cone gauge, does indeed suggest some quite natural recipe to treat the zero modes in the Discretized Light Front Quantization of gauge theories.
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Quantization of gauge theories on characteristic surfaces and in the light-cone gauge is discussed. Implementation of the Mandelstam-Leibbrandt prescription for the spurious singularity is shown to require two distinct null planes, with independent degrees of freedom initialized on each. The relation of this theory to the usual light-cone formulation of gauge eld theory, using a single null pla...
متن کامل06 03 7 v 2 5 J un 1 99 8 Two - dimensional QCD , instanton contributions and the perturbative Wu - Mandelstam - Leibbrandt prescription
The exact Wilson loop expression for the pure Yang-Mills U (N) theory on a sphere S 2 of radius R exhibits, in the decompactification limit R → ∞, the expected pure area exponentiation. This behaviour can be understood as due to the sum over all instanton sectors. If only the zero instanton sector is considered, in the decompactification limit one exactly recovers the sum of the perturbative se...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2016
ISSN: 2470-0010,2470-0029
DOI: 10.1103/physrevd.93.065033