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Radiative quark masses constrained by the gauge group only

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Zeitschrift für Physik C Particles and Fields

Abstract

We discuss the possibility of obtaining the observed pattern of quark masses and mixings as a consequence of radiative corrections, gauge invariance and particle content of the theory. We do not allow any kind of additional symmetry, such as family and discrete symmetries. A model based on the gauge groupSU(3)×SU(2) L ×SU(2) R ×U(1) B−L is considered. It turns out that the correct values of quark masses can be reasonably reproduced. The typical strength of the flavour changing couplings of theZ 0-boson is however at least one order of magnitude above the experimental upper bounds.

A comparison is made with a model in which an additional discrete symmetry is present. In this case flavour changing phenomena can be kept under control.

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Authors and Affiliations

  1. Scuola Normale Superiore, I-56100, Pisa, Italy

    R. Rattazzi

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  1. R. Rattazzi
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Rattazzi, R. Radiative quark masses constrained by the gauge group only. Z. Phys. C - Particles and Fields 52, 575–581 (1991). https://doi.org/10.1007/BF01562331

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  • DOI: https://doi.org/10.1007/BF01562331

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