Implications of Some Static Spherically Symmetric Graviton-Dilaton Solutions in Brans-Dicke and Low Energy String Theory
| dc.creator | Rama, S. Kalyana | |
| dc.date | 1995-05-24 | |
| dc.date.accessioned | 2026-07-07T04:21:11Z | |
| dc.date.available | 2026-07-07T04:21:11Z | |
| dc.description | Analysing the static, spherically symmetric graviton-dilaton solutions in low energy string and Brans-Dicke theory, we find the following. For a charge neutral point star, these theories cannot predict non trivial PPN parameters, $β$ and $γ$, without introducing naked singularities. We then couple a cosmological constant $Λ$ as in low energy string theory. We find that only in low energy string theory, a non zero $Λ$ leads to a curvature singularity, which is much worse than a naked singularity. Requiring its absence upto a distance $r_*$ implies a bound $| Λ| < 10^{- 102} (\frac{r_*}{\rm pc})^{- 2}$ in natural units. If $r_* \simeq 1 {\rm Mpc}$ then $| Λ| < 10^{- 114}$ and, if $r_* \simeq 10^{28} {\rm cm}$ then $| Λ| < 10^{- 122}$ in natural units. | |
| dc.description | 11 pages. Latex File. Invited Talk presented at the XI DAE Symposium held during 21 - 28 December 1994 in Shantiniketan, India | |
| dc.identifier | https://arxiv.org/abs/hep-th/9505151 | |
| dc.identifier | http://arxiv.org/abs/hep-th/9505151 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/54212 | |
| dc.subject | High Energy Physics - Theory | |
| dc.subject | Astrophysics | |
| dc.subject | General Relativity and Quantum Cosmology | |
| dc.title | Implications of Some Static Spherically Symmetric Graviton-Dilaton Solutions in Brans-Dicke and Low Energy String Theory | |
| dc.type | text |