Can the Type-IIB axion prevent Pre-big Bang inflation?

Details Can the Type-IIB axion prevent Pre-big Bang inflation? Can the Type-IIB axion prevent Pre-big Bang inflation?

1998-06-19

arxiv.org/abs/hep-th/9806167v1

Phys.Lett. B441 (1998) 40-45

Physics

High Energy Physics

High Energy Physics - Theory

harvmac, epsf. 3 figures included

Scientific paper

10.1016/S0370-2693(98)01183-6

We look at the possibility of superinflationary behavior in a class of anisotropic Type-IIB superstring cosmologies in the context of Pre-big Bang scenario and find that there exists a rather narrow range of parameters for which these models inflate. We then show that, although in general this behavior is left untouched by the introduction of a Ramond-Ramond axion field through a SL(2,R) rotation, there exists a particular class of axions for which inflation disappears completely. Asymptotic past initial conditions are briefly discussed, and some speculations on the possible extension of Pre-big Bang ideas to gravitational collapse are presented.

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