On the Role of the Higgs Mechanism in Present Electroweak Precision Tests

Abstract

Based on the observables $\MW$, ${\Gamma }_l$, $\bar\sw^2(\MZ^2)$, we evaluate the parameters $\Delta x,\Delta y$ and $\epsilon$ 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 $\Delta x$, $\Delta y$, $\epsilon$. 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 $\epsilon$, which differ from the standard-model results by the replacement $\log\MH\to\logΛ$ for a heavy Higgs mass, $\MH$ (where $\Lambda$ denotes an effective UV cut-off).

10 pages latex, BI-TP 94/31

References in corpus (3)

• The Electroweak Chiral Lagrangian for the Standard Model with a Heavy Higgs
• On the Significance of the Electroweak Precision Data
• On the Interpretation of the Electroweak Precision Data

Cited by in corpus (5)

• Precision Physics at LEP
• Implications of the Electroweak Precision Data: a 1996 Update
• On the Observation of Bosonic Loop Corrections in Electroweak Precision Experiments
• On Non-Standard Couplings among the Electroweak Vector Bosons
• Symmetry group of massive Yang-Mills theories without Higgs and their quantization