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CMB anomalies from an inflationary model in string theory · Around

2013

CMB anomalies from an inflationary model in string theory

Liu, Zhi-Guo, Guo, Zong-Kuan, Piao, Yun-Song

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Recent Planck measurements show some CMB anomalies on large angular scales, which confirms the early observations by WMAP.

We show that an inflationary model, in which before the slow-roll inflation the Universe is in a superinflationary phase, can generate a large-scale cutoff in the primordial power spectrum, which may account for not only the power suppression on large angular scales, but also a large dipole power asymmetry in the CMB.
We discuss an implementation of our model in string theory.

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