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2013

Large-scale anomalies from primordial dissipation

D'Amico, Guido, Gobbetti, Roberto, Kleban, Matthew et al.

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We analyze an inflationary model in which part of the power in density perturbations arises due to particle production.

The amount of particle production is modulated by an auxiliary field.
Given an initial gradient for the auxiliary field, this model produces a hemispherical power asymmetry and a suppression of power at low multipoles similar to those observed by WMAP and Planck in the CMB temperature.
It also predicts an additive contribution to $\delta T$ with support only at very small $l$ that is aligned with the direction of the power asymmetry and has a definite sign, as well as small oscillations in the power spectrum at all $l$.

Large-scale anomalies from primordial dissipation · Around

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L. P. Grishchuk
1978
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L. Kofman
1997
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H. Eriksen
2004
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M. Alishahiha
2004
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L. Kofman
2004
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C. Gordon
2005
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B. Freivogel
2006
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