Padé approximation and glueball mass estimates in 3d and 4d with N_c = 2,3 colors

Abstract

A Padé approximation approach, rooted in an infrared moment technique, is employed to provide mass estimates for various glueball states in pure gauge theories. The main input in this analysis are theoretically well-motivated fits to lattice gluon propagator data, which are by now available for both SU(2) and SU(3) in 3 and 4 space-time dimensions. We construct appropriate gauge invariant and Lorentz covariant operators in the (pseudo)scalar and (pseudo)tensor sector. Our estimates compare reasonably well with a variety of lattice sources directly aimed at extracting glueball masses.

11 pages, 5 .png figures. v2: extra figure, calculational details and references; improved presentation and title. Version to appear in Phys.Lett.B

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• The universal character of Zwanziger's horizon function in Euclidean Yang-Mills theories
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