Infrared Factorization, Wilson Lines and the Heavy Quark Limit

Details Infrared Factorization, Wilson Lines and the Heavy Quark Limit Infrared Factorization, Wilson Lines and the Heavy Quark Limit

1992-03-27

arxiv.org/abs/hep-ph/9203222v1

Phys.Lett.B279:359-366,1992

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages

Scientific paper

10.1016/0370-2693(92)90405-S

It is shown that, in QCD, the same universal function $\Gamma_{cusp}(\vartheta, \alpha_\s)$ determines the infrared behaviour of the on-shell quark form factor, the velocity-dependent anomalous dimension in the heavy quark effective field theory (HQET) and the renormalization properties of the vacuum averaged Wilson lines with a cusp. It is demonstrated that a combined use of the methods developed in the relevant different branches of quantum field theory essentially facilitates the all-order study of the asymptotic and analytic properties of this function.

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