Stochastic bias from loops of massive particles during inflation
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.
- Authors:
- Publication Date:
- Research Org.:
- California Institute of Technology (CalTech), Pasadena, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- OSTI Identifier:
- 1464835
- Alternate Identifier(s):
- OSTI ID: 1600497
- Grant/Contract Number:
- SC0011632
- Resource Type:
- Published Article
- Journal Name:
- Physics Letters B
- Additional Journal Information:
- Journal Name: Physics Letters B Journal Volume: 785 Journal Issue: C; Journal ID: ISSN 0370-2693
- Publisher:
- Elsevier
- Country of Publication:
- Netherlands
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Citation Formats
McAneny, Michael, Ridgway, Alexander K., Solon, Mikhail P., and Wise, Mark B. Stochastic bias from loops of massive particles during inflation. Netherlands: N. p., 2018.
Web. doi:10.1016/j.physletb.2018.06.026.
McAneny, Michael, Ridgway, Alexander K., Solon, Mikhail P., & Wise, Mark B. Stochastic bias from loops of massive particles during inflation. Netherlands. doi:10.1016/j.physletb.2018.06.026.
McAneny, Michael, Ridgway, Alexander K., Solon, Mikhail P., and Wise, Mark B. Mon .
"Stochastic bias from loops of massive particles during inflation". Netherlands. doi:10.1016/j.physletb.2018.06.026.
@article{osti_1464835,
title = {Stochastic bias from loops of massive particles during inflation},
author = {McAneny, Michael and Ridgway, Alexander K. and Solon, Mikhail P. and Wise, Mark B.},
abstractNote = {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.},
doi = {10.1016/j.physletb.2018.06.026},
journal = {Physics Letters B},
number = C,
volume = 785,
place = {Netherlands},
year = {2018},
month = {10}
}
DOI: 10.1016/j.physletb.2018.06.026
Web of Science
Works referencing / citing this record:
The Hunt for Primordial Interactions in the Large-Scale Structures of the Universe
journal, August 2019
- Biagetti, Matteo
- Galaxies, Vol. 7, Issue 3
New shapes of primordial non-Gaussianity from quasi-single field inflation with multiple isocurvatons
journal, August 2019
- McAneny, Michael; Ridgway, Alexander K.
- Physical Review D, Vol. 100, Issue 4