The Quasi-Infra-Red Fixed Point at Higher Loops

Details The Quasi-Infra-Red Fixed Point at Higher Loops The Quasi-Infra-Red Fixed Point at Higher Loops

1996-10-09

arxiv.org/abs/hep-ph/9610296v4

Phys.Lett. B392 (1997) 376-382

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, including 3 figures. Version as published in Phys. Lett. B, but with minor errors corrected, particularly f(T)-->f(0

Scientific paper

10.1016/S0370-2693(96)01549-3

We calculate the four-loop $\beta$-function for the generalised Wess-Zumino
model. We use the result and Pad\'e-Borel summation to discuss the domain of
attraction of the quasi-infra-red fixed point of the top-quark Yukawa coupling
in the supersymmetric standard model, and argue that the domain is in fact
substantial.

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