Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1994-06-23
Z.Phys. C67 (1995) 109-114
Physics
High Energy Physics
High Energy Physics - Phenomenology
10 pages latex, BI-TP 94/31
Scientific paper
10.1007/BF01564825
Based on the observables $\MW$, $\Gamma_l$, $\bar\sw^2(\MZ^2)$, we evaluate the parameters $\Delta x, \Delta y$ and $\varepsilon$ at one-loop level within an electroweak massive vector-boson theory, which does not employ the Higgs mechanism. The theoretical results are consistent with the experimental ones on $\Delta x$, $\Delta y$, $\varepsilon$. The theoretical prediction for $\Delta y$ coincides with the standard-model one (apart from numerically irrelevant terms which vanish for $\MH\to\infty$). Non-renormalizability only affects $\Delta x$ and $\varepsilon$, which differ from the standard-model results by the replacement $\log\MH\to\log\Lambda$ for a heavy Higgs mass, $\MH$ (where $\Lambda$ denotes an effective UV cut-off).
Dittmaier Stefan
Grosse-Knetter Carsten
Schildknecht Dieter
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