Implications of the Electroweak Precision Data: a 1996 Update
arXiv:hep-ph/9609488 · doi:10.1016/S0370-2693(96)01498-0
Abstract
The most reliable prediction for the Higgs-boson mass, M_H, is obtained in a fit to the leptonic Z-resonance observables Gamma_l and swbar^2 combined with the W-boson mass, M_W, and top-quark mass, m_t, measurements. The corresponding bounds on M_H are independent of potential uncertainties related to R_b, R_c, and alpha_s(M_Z^2), and they are not significantly further improved by including also the experimental information on the inclusive (hadronic and total) Z-boson decays. At the 1sigma level, we obtain M_H<360GeV using swbar^2(LEP+SLD) and M_H<540GeV using swbar^2(LEP). Our analysis in terms of effective parameters confirms previous conclusions with increased accuracy. In the mass parameter, Delta x, and the mixing parameter, epsilon, pure fermion loops are sufficient, while for the coupling parameter, Delta y, (M_H-insensitive) bosonic contributions are essential for consistency with experiment, thus providing indirect empirical evidence for the non-Abelian structure of the theory.
14 pages, latex, 6 postscript figures included
References in corpus (18)
- Observation of Top Quark Production in Pbar-P Collisions
- Observation of the Top Quark
- Hadronic contributions to of the leptons and to the effective fine structure constant
- Precise Measurement of the Left-Right Cross Section Asymmetry in Boson Production by $\ee$ Collisions
- Measurement of the W Boson Mass
- A Measurement of the W Boson Mass
- Implications of High Precision Experiments and the CDF Top Quark Candidates
- On the Significance of the Electroweak Precision Data
- Precision Tests of the MSSM
- On the Interpretation of the Electroweak Precision Data
- Refined Analysis of the Electroweak Precision Data
- The Top Quark and the Higgs Boson Mass from LEP SLC and CDF Data
- The Higgs Boson Mass from Precision Electroweak Data
- First Evidence for Electroweak Radiative Corrections from the New Precision Data
- Constraints on the electroweak universal parameters and the top and Higgs masses from updated LEP/SLC data
- How reliably can the Higgs-Boson Mass be predicted from Electroweak Precision Data?
- On the Role of the Higgs Mechanism in Present Electroweak Precision Tests
- On the Observation of Bosonic Loop Corrections in Electroweak Precision Experiments