The Quasiinfrared fixed point at higher loops
Oct, 199612 pages
Published in:
- Phys.Lett.B 392 (1997) 376-382
e-Print:
- hep-ph/9610296 [hep-ph]
Report number:
- LTH-386
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Abstract:
We calculate the four-loop -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.Note:
- 12 pages, including 3 figures. Version as published in Phys. Lett. B, but with minor errors corrected, particularly f(T)-->f(0). Plain TeX. Uses Harvmac and epsf Report-no: LTH 386
- Wess-Zumino model
- supersymmetry: superfield
- perturbation theory: higher-order
- higher-order: 4
- renormalization group: beta function
- coupling: Yukawa
- numerical calculations
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