# Gauge coupling variation in brane models

@article{Palma2003GaugeCV, title={Gauge coupling variation in brane models}, author={Gonzalo A. Palma and Philippe Brax and A. C. Davis and Carsten van de Bruck}, journal={Physical Review D}, year={2003}, volume={68}, pages={123519} }

We consider the space-time variation of gauge couplings in brane-world models induced by the coupling to a bulk scalar field. A variation is generated by the running of the gauge couplings with energy and a conformal anomaly while going from the Jordan to the Einstein frame. We indicate that the one-loop corrections cancel implying that one obtains a variation of the fine structure constant by either directly coupling the gauge fields to the bulk scalar field or having bulk scalar field…

## 32 Citations

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## References

The scalar-tensor theory of gravitation

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- 2003

The scalar-tensor theory of gravitation is one of the most popular alternatives to Einstein's theory of gravitation. This book provides a clear and concise introduction to the theoretical ideas and…