The Cosmological Slingshot Scenario: a Stringy Proposal for the Early Time Cosmology - High Energy Physics - TheoryReport as inadecuate




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Abstract: In the Cosmological Slingshot Scenario, our Universe is a D3-brane thatextends in the 4d noncompact directions of a warped Calabi-Yau compactificationof IIB Supergravity. Early time cosmology corresponds to a period in which thebrane moves inside a warped throat where a non-vanishing angular momentumensures that the trajectory of the brane has a turning point. The correspondinginduced metric on the D3-brane experiences a cosmological evolution with abounce. In this framework, the homogeneity, flatness, and isotropy problems ofstandard cosmology might be avoided. The power spectrum of primordialperturbations of the brane embedding can be found and it is shown to be inagreement to WMAP data.



Author: Cristiano Germani, Nicolas Grandi, Alex Kehagias

Source: https://arxiv.org/







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