Z WIDTH AND BRANCHING RATIOS IN EXTENDED GAUGE MODELS
- ALTARELLI, G. CERN—Geneva, Switzerland
- CASALBUONI, R. Dept. de Physique Théorique, Université de Genève, CH-1211 Genève 4, Switzerland
- DOMINICI, D. Dpto di Matematica e Fisica, Università di Camerino, I-62032 Camerino, and INFN, Sezione di Firenze, I-50125 Firenze, Switzerland
- FERUGLIO, F. Dept. de Physique Théorique, Université de Genève, CH-1211 Genève 4, Switzerland
- GATTO, R. Dept. de Physique Théorique, Université de Genève, CH-1211 Genève 4, Switzerland
- 2011-11-21
Published in:
- Modern Physics Letters A. - World Scientific Pub Co Pte Lt. - 1990, vol. 05, no. 07, p. 495-508
English
We study the effects of a possible new heavy neutral vector boson ZH on the partial and total widths of the ZL which are being studied at LEP. The analysis is formulated in as general terms as possible, without commitment to a particular model. The constraints on [Formula: see text] from CDF and the new data on [Formula: see text] and [Formula: see text] are taken into account. As expected, the induced deviations are at the level of a few per cent. The allowed range decreases with increasing mt . The lepton widths and the peak cross-sections are particularly sensitive. A fourth light neutrino is excluded also in extended gauge models.
- Language
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- English
- Open access status
- green
- Identifiers
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- DOI 10.1142/s0217732390000573
- ISSN 0217-7323
- Persistent URL
- https://sonar.ch/global/documents/7612
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