McAneny, Michael and Ridgway, Alexander K. and Solon, Mikhail P. and Wise, Mark B. (2018) Stochastic Bias from Loops of Massive Particles During Inflation. Physics Letters B, 785 . pp. 332-337. ISSN 0370-2693. doi:10.1016/j.physletb.2018.06.026. https://resolver.caltech.edu/CaltechAUTHORS:20180109-161940287
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Abstract
Primordial non-Gaussianities enhanced at small wavevectors can induce a power spectrum of the galaxy overdensity that differs greatly from that of the matter overdensity at large length scales. In previous work, it was shown that “squeezed" three-point and “collapsed" four-point functions of the curvature perturbation ζ can generate these non-Gaussianities and give rise to so-called scale-dependent and stochastic bias in the galaxy overdensity power spectrum. We explore a third way to generate non-Gaussianities enhanced at small wavevectors: the infrared behavior of quantum loop contributions to the four-point correlations of ζ. We show that these loop effects can give the largest contributions to the four-point function of ζ in the collapsed limit and be observable in the context of quasi-single field inflation.
| Item Type: | Article | |||||||||
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| Alternate Title: | Loop-Induced Stochastic Bias at Small Wavevectors | |||||||||
| Additional Information: | © 2018 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP3. Received 3 January 2018, Revised 8 June 2018, Accepted 9 June 2018, Available online 15 June 2018. This work was supported by the DOE Grant DE-SC0011632 and by the Walter Burke Institute for Theoretical Physics. | |||||||||
| Group: | Walter Burke Institute for Theoretical Physics | |||||||||
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| DOI: | 10.1016/j.physletb.2018.06.026 | |||||||||
| Record Number: | CaltechAUTHORS:20180109-161940287 | |||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20180109-161940287 | |||||||||
| Official Citation: | Michael McAneny, Alexander K. Ridgway, Mikhail P. Solon, Mark B. Wise, Stochastic bias from loops of massive particles during inflation, Physics Letters B, Volume 785, 2018, Pages 332-337, ISSN 0370-2693, https://doi.org/10.1016/j.physletb.2018.06.026. (http://www.sciencedirect.com/science/article/pii/S0370269318304817) | |||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | |||||||||
| ID Code: | 84213 | |||||||||
| Collection: | CaltechAUTHORS | |||||||||
| Deposited By: | Joy Painter | |||||||||
| Deposited On: | 10 Jan 2018 00:25 | |||||||||
| Last Modified: | 15 Nov 2021 20:17 |
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