skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: First constraint on the neutrino-induced phase shift in the spectrum of baryon acoustic oscillations

Abstract

The existence of the cosmic neutrino background is a robust prediction of the hot big bang model. These neutrinos were a dominant component of the energy density in the early Universe and therefore played an important role in the evolution of cosmological perturbations. The energy density of the cosmic neutrino background has been measured using the abundances of light elements and the anisotropies of the cosmic microwave background. A complementary and more robust probe is provided by a distinct shift in the temporal phase of sound waves in the primordial plasma that is produced by fluctuations in the neutrino density. Here, we report on the first constraint on this neutrino-induced phase shift in the spectrum of baryon acoustic oscillations of the BOSS DR12 data. Constraining the acoustic scale using Planck data while marginalizing over the effects of neutrinos in the cosmic microwave background, we find a non-zero phase shift at greater than 95% confidence. Besides providing a new test of the cosmic neutrino background, our work is the first application of the baryon acoustic oscillation signal to early Universe physics.

Authors:
 [1]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [3];  [4];  [5]; ORCiD logo [6];  [7]
  1. Univ. of Amsterdam (Netherlands). Inst. of Theoretical Physics
  2. Univ. of Portsmouth (United Kingdom). Inst. of Cosmology and Gravitation; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  3. Univ. of California, San Diego, CA (United States). Dept. of Physics
  4. Brookhaven National Lab. (BNL), Upton, NY (United States). Physics Dept.
  5. Univ. Nacional Autonoma de Mexico (UNAM), Mexico City (Mexico). Inst. de Fisica
  6. Univ. of Amsterdam (Netherlands). Inst. of Theoretical Physics; Univ. of Cambridge (United Kingdom). DAMTP
  7. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. Paris-Saclay, Gif-sur-Yvette (France). IRFU, CEA
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory-National Energy Research Scientific Computing Center (NERSC)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1542637
DOE Contract Number:  
AC02-05CH11231; SC0009919
Resource Type:
Journal Article
Journal Name:
Nature Physics
Additional Journal Information:
Journal Volume: 15; Journal Issue: 5; Journal ID: ISSN 1745-2473
Country of Publication:
United States
Language:
English

Citation Formats

Baumann, Daniel, Beutler, Florian, Flauger, Raphael, Green, Daniel, Slosar, Anže, Vargas-Magaña, Mariana, Wallisch, Benjamin, and Yèche, Christophe. First constraint on the neutrino-induced phase shift in the spectrum of baryon acoustic oscillations. United States: N. p., 2019. Web. doi:10.1038/s41567-019-0435-6.
Baumann, Daniel, Beutler, Florian, Flauger, Raphael, Green, Daniel, Slosar, Anže, Vargas-Magaña, Mariana, Wallisch, Benjamin, & Yèche, Christophe. First constraint on the neutrino-induced phase shift in the spectrum of baryon acoustic oscillations. United States. doi:10.1038/s41567-019-0435-6.
Baumann, Daniel, Beutler, Florian, Flauger, Raphael, Green, Daniel, Slosar, Anže, Vargas-Magaña, Mariana, Wallisch, Benjamin, and Yèche, Christophe. Mon . "First constraint on the neutrino-induced phase shift in the spectrum of baryon acoustic oscillations". United States. doi:10.1038/s41567-019-0435-6.
@article{osti_1542637,
title = {First constraint on the neutrino-induced phase shift in the spectrum of baryon acoustic oscillations},
author = {Baumann, Daniel and Beutler, Florian and Flauger, Raphael and Green, Daniel and Slosar, Anže and Vargas-Magaña, Mariana and Wallisch, Benjamin and Yèche, Christophe},
abstractNote = {The existence of the cosmic neutrino background is a robust prediction of the hot big bang model. These neutrinos were a dominant component of the energy density in the early Universe and therefore played an important role in the evolution of cosmological perturbations. The energy density of the cosmic neutrino background has been measured using the abundances of light elements and the anisotropies of the cosmic microwave background. A complementary and more robust probe is provided by a distinct shift in the temporal phase of sound waves in the primordial plasma that is produced by fluctuations in the neutrino density. Here, we report on the first constraint on this neutrino-induced phase shift in the spectrum of baryon acoustic oscillations of the BOSS DR12 data. Constraining the acoustic scale using Planck data while marginalizing over the effects of neutrinos in the cosmic microwave background, we find a non-zero phase shift at greater than 95% confidence. Besides providing a new test of the cosmic neutrino background, our work is the first application of the baryon acoustic oscillation signal to early Universe physics.},
doi = {10.1038/s41567-019-0435-6},
journal = {Nature Physics},
issn = {1745-2473},
number = 5,
volume = 15,
place = {United States},
year = {2019},
month = {2}
}

Works referenced in this record:

Universal Neutrino Degeneracy
journal, November 1962


Prospects for the direct detection of the cosmic neutrino background
journal, August 2009


Signatures of relativistic neutrinos in CMB anisotropy and matter clustering
journal, April 2004


Phases of new physics in the CMB
journal, January 2016

  • Baumann, Daniel; Green, Daniel; Meyers, Joel
  • Journal of Cosmology and Astroparticle Physics, Vol. 2016, Issue 01
  • DOI: 10.1088/1475-7516/2016/01/007

First Detection of the Acoustic Oscillation Phase Shift Expected from the Cosmic Neutrino Background
journal, August 2015


Phases of New Physics in the BAO Spectrum
journal, November 2017

  • Baumann, Daniel; Green, Daniel; Zaldarriaga, Matias
  • Journal of Cosmology and Astroparticle Physics, Vol. 2017, Issue 11
  • DOI: 10.1088/1475-7516/2017/11/007

Searching for light relics with large-scale structure
journal, August 2018

  • Baumann, Daniel; Green, Daniel; Wallisch, Benjamin
  • Journal of Cosmology and Astroparticle Physics, Vol. 2018, Issue 08
  • DOI: 10.1088/1475-7516/2018/08/029

Relic neutrino decoupling including flavour oscillations
journal, November 2005


Dynamics of cosmological perturbations in position space
journal, June 2002


On the Robustness of the Acoustic Scale in the Low‐Redshift Clustering of Matter
journal, August 2007

  • Eisenstein, Daniel J.; Seo, Hee‐Jong; White, Martin
  • The Astrophysical Journal, Vol. 664, Issue 2
  • DOI: 10.1086/518755

New light species and the CMB
journal, December 2013

  • Brust, Christopher; Kaplan, David E.; Walters, Matthew T.
  • Journal of High Energy Physics, Vol. 2013, Issue 12
  • DOI: 10.1007/JHEP12(2013)058

Hidden dark matter sector, dark radiation, and the CMB
journal, September 2015


New Target for Cosmic Axion Searches
journal, October 2016


Improving Cosmological Distance Measurements by Reconstruction of the Baryon Acoustic Peak
journal, August 2007

  • Eisenstein, Daniel J.; Seo, Hee‐Jong; Sirko, Edwin
  • The Astrophysical Journal, Vol. 664, Issue 2
  • DOI: 10.1086/518712

The Eleventh and Twelfth data Releases of the Sloan Digital sky Survey: Final data from Sdss-Iii
journal, July 2015

  • Alam, Shadab; Albareti, Franco D.; Prieto, Carlos Allende
  • The Astrophysical Journal Supplement Series, Vol. 219, Issue 1
  • DOI: 10.1088/0067-0049/219/1/12

DESI and other Dark Energy experiments in the era of neutrino mass measurements
journal, May 2014

  • Font-Ribera, Andreu; McDonald, Patrick; Mostek, Nick
  • Journal of Cosmology and Astroparticle Physics, Vol. 2014, Issue 05
  • DOI: 10.1088/1475-7516/2014/05/023

Efficient Computation of Cosmic Microwave Background Anisotropies in Closed Friedmann‐Robertson‐Walker Models
journal, August 2000

  • Lewis, Antony; Challinor, Anthony; Lasenby, Anthony
  • The Astrophysical Journal, Vol. 538, Issue 2
  • DOI: 10.1086/309179

The Cosmic Linear Anisotropy Solving System (CLASS). Part II: Approximation schemes
journal, July 2011

  • Blas, Diego; Lesgourgues, Julien; Tram, Thomas
  • Journal of Cosmology and Astroparticle Physics, Vol. 2011, Issue 07
  • DOI: 10.1088/1475-7516/2011/07/034

Cosmological parameters from CMB and other data: A Monte Carlo approach
journal, November 2002


IPython: A System for Interactive Scientific Computing
journal, January 2007

  • Perez, Fernando; Granger, Brian E.
  • Computing in Science & Engineering, Vol. 9, Issue 3
  • DOI: 10.1109/MCSE.2007.53

Conservative constraints on early cosmology with M ONTE P YTHON
journal, February 2013

  • Audren, Benjamin; Lesgourgues, Julien; Benabed, Karim
  • Journal of Cosmology and Astroparticle Physics, Vol. 2013, Issue 02
  • DOI: 10.1088/1475-7516/2013/02/001

emcee : The MCMC Hammer
journal, March 2013

  • Foreman-Mackey, Daniel; Hogg, David W.; Lang, Dustin
  • Publications of the Astronomical Society of the Pacific, Vol. 125, Issue 925
  • DOI: 10.1086/670067

Matplotlib: A 2D Graphics Environment
journal, January 2007


nbodykit: An Open-source, Massively Parallel Toolkit for Large-scale Structure
journal, September 2018


The NumPy Array: A Structure for Efficient Numerical Computation
journal, March 2011

  • van der Walt, Stéfan; Colbert, S. Chris; Varoquaux, Gaël
  • Computing in Science & Engineering, Vol. 13, Issue 2
  • DOI: 10.1109/MCSE.2011.37

Galaxy bias and its Effects on the Baryon Acoustic Oscillation Measurements
journal, May 2011


Inference from Iterative Simulation Using Multiple Sequences
journal, November 1992


MultiDark simulations: the story of dark matter halo concentrations and density profiles
journal, February 2016

  • Klypin, Anatoly; Yepes, Gustavo; Gottlöber, Stefan
  • Monthly Notices of the Royal Astronomical Society, Vol. 457, Issue 4
  • DOI: 10.1093/mnras/stw248