Abstract
We present a minimal model for the Universe evolution fully extracted from effective String Theory. By linking this model with a minimal but well established observational information, we prove that it gives realistic predictions on early and current energy density and its results are compatible with General Relativity. Interestingly enough, the predicted current energy density is found Ω=1 and in any case with lower limit Ω≥4/9. On the other hand, the energy density at the exit of inflationary stage gives also Ω| inf =1 This result shows an agreement with General Relativity (spatially flat metric gives critical energy density) within an inequivalent Non-Einstenian context (string low energy effective equations). The order of magnitude of the energy density-dilaton coupled term at the beginning of radiation dominated stage agrees with GUT scale. Without solving the known problems about higher order corrections and graceful exit of inflation, we find this model closer to the observational Universe properties than the current available string cosmology scenarii. At a more fundamental level, this model is by its construction close to the standard cosmological evolution, and it is driven selfconsistently by the evolution of the string equation of state itself. The inflationary String Driven stage is able to reach an enough amount of inflation, describing a Big Bang like evolution for the metric.
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References
A.A. Tseytlin in String Gravity and Physics at the Planck Energy Scale, Proceedings of the Erice Chalonge School 1992, ed. by N. Sánchez (World Scientific, Singapore 1993).
H.J. De Vega and N. Sánchez, Phys.Rev.D 50 (1994) 7202.
M. Gasperini and G. Veneziano, Astropart. Phys. 1 (1993) 317.
String Theory in Cyrved Spacetimes, ed. by N. Sánchez (World Scientific, Singapore, 1998).
String Gravity and Physics at the Planck Scale, Proceedings of the Erice Chalonge School, Sept. 1995, ed. by N. Sánchez and A. Zichichi, NATO ASl 476 C, Kluwer Ac. Publ. 1995.
M. Gasperini and M. Giovannini, Phys.Rev.D 17 (1993) 1519.
M.P. Infante and N. Sánchez, Linking a Minimal Theoretical Model of Scale Factor Evolution with Observational Universe lnformation (in preparation).
M. Gasperini, N. Sánchez and G. Veneziano, Int. Jour. Mod, Phys. A 6 (1991) 3853.
M. Gasperini, N. Sánchez and G. Veneziano, Nuc. Phys. B 364 (1991) 365.
M.P. Infante and N. Sánchez, The Primordial Gravitational Wave Background in String Cosmology (accepted for publication in Phys.Rev.D).
M. Gasperini and G. Venezianom, Mod.Phys.Lett. A 8 (1993) 3701.
N. Kaloper, A. Linde and R. Bousso, Phys.Rev.D. 59 (1999) 4350.
F. Combes, H.J. De Vega, A.V. Mikhailov and N. Sánchez, Phys.Rev.D 50 (1994) 2754.
H.J. De Vega, A. Larsen and N. Sánchez, Nucl.Phys.B 427 (1994) 643.
H.J. De Vega, A. Larsen and N. Sánchez, Phys.Rev.D 51 (1995) 6917.
G. Veneziano, Phys.Lett.B 265 (1991) 287.
H.J. De Vega and N. Sánchez, Phys.Lett.B 197 (1987) 320.
N. Sánchez and G. Veneziano, Nuc.Phys.B 333 (1990) 253.
M. Gasperini, Phys.Rev.D 56 (1997) 4815.
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Infante, M.P., Sánchez, N. (2001). Minimal String Driven Cosmology and its Predictions. In: Sánchez, N.G. (eds) Current Topics in Astrofundamental Physics: The Cosmic Microwave Background. NATO Science Series, vol 562. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-0748-1_4
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DOI: https://doi.org/10.1007/978-94-010-0748-1_4
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