Stochastic bias from loops of massive particles during inflation

doi:10.1016/j.physletb.2018.06.026

Title: 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:: McAneny, Michael; Ridgway, Alexander K.; Solon, Mikhail P.; Wise, Mark B.

Publication Date:: 2018-10-01

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.

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                    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.

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                    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.

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@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}

}

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DOI: 10.1016/j.physletb.2018.06.026

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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
DOI: 10.3390/galaxies7030071

New shapes of primordial non-Gaussianity from quasi-single field inflation with multiple isocurvatons
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McAneny, Michael; Ridgway, Alexander K.
Physical Review D, Vol. 100, Issue 4
DOI: 10.1103/physrevd.100.043534

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Citation Formats

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New shapes of primordial non-Gaussianity from quasi-single field inflation with multiple isocurvatons journal, August 2019

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