Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1993-03-15
Physics
High Energy Physics
High Energy Physics - Phenomenology
To appear in the proceedings of the 4th Hellenic School on Elementary Particle Physics, Corfu, Greece, Sept. 2--20, 1992. 10 p
Scientific paper
A brief review of the role of the Higgs mechanism and the ensuing Higgs particle in the Minimal Standard Model is given. Then the property of triviality of the scalar sector in the Minimal Standard Model and the upper bound on the Higgs mass that follows is discussed. It is emphasized that the bound is obtained by limiting cutoff effects on physical processes. Actions that allow a parameterization and tuning of the leading cutoff effects are studied both analytically, in the large $N$ limit of the generalization of the $O(4)$ symmetry of the scalar sector to $O(N)$, and numerically for the physical case $N = 4$. Combining those results we show that the Minimal Standard Model will describe physics to an accuracy of a few percent up to energies of the order 2 to 4 times the Higgs mass, $M_H$, only if $M_H \le 710 \pm 60 ~ GeV$. This bound is the result of a systematic search in the space of dimension six operators and is expected to hold in the {\it continuum}. (Complete postscript file can be obtained by anonymous ftp from ftp.scri.fsu.edu as file "corfu_92.ps" from directory "pub/heller".)
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