Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-10-29
Phys.Lett.B696:214-219,2011
Physics
High Energy Physics
High Energy Physics - Phenomenology
14 pages, 3 figures; an Appendix is included, which addresses the path-dependence of the correlation function; version to appe
Scientific paper
10.1016/j.physletb.2010.12.026
The correlation lengths of nonperturbative-nonconfining and confining stochastic background Yang-Mills fields are obtained by means of a direct analytic path-integral evaluation of the Green functions of the so-called one- and two-gluon gluelumps. Numerically, these lengths turn out to be in a good agreement with those known from the earlier, Hamiltonian, treatment of such Green functions. It is also demonstrated that the correlation function of nonperturbative-nonconfining fields decreases with the deviation of the path in this correlation function from the straight-line one.
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