Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1996-08-17
Nucl.Phys.Proc.Suppl. 51C (1996) 88-96
Physics
High Energy Physics
High Energy Physics - Phenomenology
6 pages, two-column style (espcrc2.sty), using LaTeX2e. The complete paper including figures is also available via WWW at ht
Scientific paper
The evaluation of high-energy cross sections involving the SM Higgs boson requires the use of the Higgs running coupling $\lambda(\mu)$. Taking $\mu$ to be equal to the center-of-mass energy $\sqrt{s}$ of the scattering process, the perturbative approach fails for relatively small values of the Higgs mass and coupling, $\lambda(\sqrt{s})\approx 2.2$. Performing an approximate resummation of ``bubble'' Feynman diagrams, we find the scale $\mu=\sqrt{s}/ e \approx \sqrt{s}/2.7$ to yield reliable perturbative results, even for large Higgs mass and coupling. The new perturbative upper limit on the Higgs running coupling is $\lambda(\sqrt{s}/ e)\approx 4$.
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