Correlation Functions of the Scalar Field in Background NC U(1) Yang-Mills
arXiv:hep-th/0101059
Abstract
We consider the complex scalar field coupled to background NC U(1) YM and calculate the correlator of two gauge invariant composite operators. We show how the noncommutative gauge invariance is restored for higher correlators (though the Green's function itself is not invariant). It is interesting that the recently discovered noncommutative solitons appear in the calculation.
LaTeX, 7 pages, minor corrections