Black Universe epoch in String Cosmology - High Energy Physics - TheoryReport as inadecuate

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Abstract: String theory compactification involves manifolds with multiple warp factors.For cosmological applications, one often introduces a short, high-energyinflationary throat, and a long,low-energy Standard Model throat. It is assumedthat at the end of inflation,the excited Kaluza-Klein modes from theInflationary throat tunnel to the SM throat and reheat Standard Model degreesof freedom, which are attached to probe branes. However, the huge hierarchyof energy scales can result in a highly dynamic transition of the throatgeometry. We point out that in such a cosmological scenario the Standard Modelthroat together with SM brane will be cloaked by a Schwarzschild horizon,produced by the Kaluza-Klein modes tunneling from the short throat. The BlackBrane formation is dual to the first order chiral phase transition of thecascading gauge theory. We calculate the critical energy density correspondingthe formation of the the BH horizon in the long throat. We discuss the dualitybetween -Black Universe- cosmology and an expanding universe driven by the hotgauge theory radiation. We address the new problem of the hierarchicalmultiple-throat scenarios: SM brane disappearance after the decay of the BHhorizon.

Author: Alex Buchel, Lev Kofman


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