Abstract
SU(2)LxU(1)YxŨ(1) Modelsmodels have received considerable attention during the last several years [1]. They often arise as the low energy limit of interesting GUT and superstring theories. It is understood that gluons and quarks and leptons of the three generations have the same transformation properties under SU(2)LxU(1)Y as in the standard model (SM). There may exist additional exotic fields. In the cases of interest there exists an orthogonality constraint between the Ũ(1) and U(1)Y quantum numbers: this can be traced to the fact that such models are descendants of gauge theories with simple Lie groups.
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References
U. Amaldi et al., Phys. Rev. D36, 1385 (1987); G. Costa et al., Nucl. Phys. B297, 244 (1988) and articles cited therein.
G. Degrassi and A. Sirlin, “Renormalization of Constrained SU (2)LXU (1)YX Ũ(1) (1) Models”, NYU preprint (1989). The present talk is based on the analysis of this paper.
A. Sirlin, Phys. Rev. D22, 971 (1980).
W. J. Marciano and A. Sirlin, Phys. Rev. D35, 1672 (1987).
W. J. Marciano and A. Sirlin, Phys. Rev. D22, 2695 (1980).
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Degrassi, G., Sirlin, A. (1989). A Simple Renormalization Framework for SU(2)LxU(1)YxŨ(1) Models. In: Kühn, J.H. (eds) Radiative Corrections for e+e- Collisions. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-74925-4_15
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DOI: https://doi.org/10.1007/978-3-642-74925-4_15
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