Summary
A mechanism to generate masses for gauge mesons in conformal quantum gravity is suggested. The scalar Lagrangian generates a conformal gravity contribution. This model avoids the occurrence of the Higgs field, which can be absorbed in the metric as a conformal factor.
References
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Barbero, F., Tiemblo, A. & Tresguerres, R. Mass generation for gauge mesons in conformal quantum gravity. Nuov Cim A 103, 297–301 (1990). https://doi.org/10.1007/BF02820602
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DOI: https://doi.org/10.1007/BF02820602