Flow Equations for N Point Functions and Bound States

Details Flow Equations for N Point Functions and Bound States Flow Equations for N Point Functions and Bound States

1993-08-11

arxiv.org/abs/hep-ph/9308260v2

Z.Phys.C62:503-510,1994

Physics

High Energy Physics

High Energy Physics - Phenomenology

17 pages, HD-THEP-93-30

Scientific paper

10.1007/BF01555911

We discuss the exact renormalization group or flow equation for the effective action and its decomposition into one particle irreducible N point functions. With the help of a truncated flow equation for the four point function we study the bound state problem for scalar fields. A combination of analytic and numerical methods is proposed, which is applied to the Wick-Cutkosky model and a QCD-motivated interaction. We present results for the bound state masses and the Bethe-Salpeter wave function. (Figs. 1-4 attached as separate uuencoded post-script files.)

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