Dynamical Fine Tuning in Brane Inflation - High Energy Physics - TheoryReport as inadecuate




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Abstract: We investigate a novel mechanism of dynamical tuning of a flat potential inthe open string landscape within the context of warped brane-antibraneinflation in type IIB string theory. Because of competing effects betweeninteractions with the moduli stabilizing D7-branes in the warped throat andanti-D3-branes at the tip, a stack of branes gives rise to a local minimum ofthe potential, holding the branes high up in the throat. As branes successivelytunnel out of the local minimum to the bottom of the throat the potentialbarrier becomes lower and is eventually replaced by a flat inflection point,around which the remaining branes easily inflate. This dynamical flattening ofthe inflaton potential reduces the need to fine tune the potential by hand, andalso leads to successful inflation for a larger range of inflaton initialconditions, due to trapping in the local minimum.



Author: James M. Cline, Loison Hoi, Bret Underwood

Source: https://arxiv.org/







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