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Non-Gaussian Enhancements of Galactic Halo Correlations in Quasi-Single Field Inflation

An, Haipeng and McAneny, Michael and Ridgway, Alexander K. and Wise, Mark B. (2018) Non-Gaussian Enhancements of Galactic Halo Correlations in Quasi-Single Field Inflation. Physical Review D, 97 (12). Art. No. 123528. ISSN 2470-0010. https://resolver.caltech.edu/CaltechAUTHORS:20180129-091837898

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Abstract

We consider a quasi-single field inflation model in which the inflaton interacts with a massive scalar field called the isocurvaton. Due to the breaking of time translational invariance by the inflaton background, these interactions induce kinetic mixing between the inflaton and isocurvaton, which is parameterized by a constant μ . We derive analytic formulas for the curvature perturbation two-, three-, four-, five-, and six-point functions explicitly in terms of the external wave vectors in the limit where μ and the mass of the isocurvaton m are both much smaller than H . In previous work, it has been noted that when m / H and μ / H are small, the non-Gaussianities predicted by quasi-single field inflation give rise to long wavelength enhancements of the power spectrum for biased objects (e.g., galactic halos). We review this calculation, and calculate the analogous enhanced contribution to the bispectrum of biased objects. We determine the scale at which these enhanced terms are larger than the Gaussian piece. We also identify the scaling of these enhanced parts to the n-point function of biased objects.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1103/PhysRevD.97.123528DOIArticle
https://arxiv.org/abs/1711.02667arXivDiscussion Paper
Additional Information:© 2018 Published by the American Physical Society. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3. Received 2 January 2018; published 19 June 2018. We would like to thank Olivier Doré, Roland de-Putter, Daniel Green, and Mikhail Solon for useful discussions. This work was supported by the DOE Grant No. DE-SC0011632. We are also grateful for the support provided by the Walter Burke Institute for Theoretical Physics.
Group:Walter Burke Institute for Theoretical Physics
Funders:
Funding AgencyGrant Number
Department of Energy (DOE)DE-SC0011632
Walter Burke Institute for Theoretical Physics, CaltechUNSPECIFIED
SCOAP3UNSPECIFIED
Issue or Number:12
Record Number:CaltechAUTHORS:20180129-091837898
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20180129-091837898
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:84558
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:31 Jan 2018 00:28
Last Modified:03 Oct 2019 19:19

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