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Stringy Origins of Cosmic Structure: The D-brane vector curvaton

Tuesday 26th June 2012 - 16:45 to 17:00
INI Seminar Room 1
I will discuss how the U(1) vector fields that live on the worldvolumes of D-branes in Type IIB string theory may play the role of vector curvatons and hence give rise to distinctive features in the spectrum and bispectrum of the curvature perturbation. I will first consider vector fields on D3-branes in open-string inflation, as a means of illustrating the principle. I will then discuss a D7-brane vector curvaton scenario in closed-string inflation.
Presentation Material: 
University of Cambridge Research Councils UK
    Clay Mathematics Institute London Mathematical Society NM Rothschild and Sons