The Brans-Dicke-Rastall theory
| Autor: | Caramês, Thiago R. P., Daouda, Mahamadou H., Fabris, Júlio C., de Oliveira, Adriano M., Piattella, Oliver F., Strokov, Vladimir |
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| Rok vydání: | 2014 |
| Předmět: | |
| Zdroj: | Eur. Phys. J. C74 (2014) 3145 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1140/epjc/s10052-014-3145-3 |
| Popis: | We formulate a theory combining the principles of a scalar-tensor gravity and Rastall's proposal of a violation of the usual conservation laws. We obtain a scalar-tensor theory with two parameters $\omega$ and $\lambda$, the latter quantifying the violation of the usual conservation laws. The only exact spherically symmetric solution is that of Robinson-Bertotti besides Schwarzschild solution. A PPN analysis reveals that General Relativity results are reproduced when $\lambda = 0$. The cosmological case displays a possibility of deceleration/acceleration or acceleration/deceleration transitions during the matter dominated phase depending on the values of the free parameters. Comment: 17 pages, 3 figures |
| Databáze: | arXiv |
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