Test for Cosmological Parity Violation Using the 3D Distribution of Galaxies

Robert N. Cahn, Zachary Slepian, and Jiamin Hou
Phys. Rev. Lett. 130, 201002 – Published 19 May 2023

Abstract

We show how the galaxy four-point correlation function can test for cosmological parity violation. The detection of cosmological parity violation would reflect previously unknown forces present at the earliest moments of the Universe. Recent developments both in rapidly evaluating galaxy N-point correlation functions and in determining the corresponding covariance matrices make the search for parity violation in the four-point correlation function possible in current and upcoming surveys such as those undertaken by Dark Energy Spectroscopic Instrument, the Euclid satellite, and the Vera C. Rubin Observatory. We estimate the limits on cosmic parity violation that could be set with these data.

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  • Received 28 October 2021
  • Revised 7 January 2023
  • Accepted 10 April 2023

DOI:https://doi.org/10.1103/PhysRevLett.130.201002

© 2023 American Physical Society

Physics Subject Headings (PhySH)

Gravitation, Cosmology & Astrophysics

Authors & Affiliations

Robert N. Cahn*

  • Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720, USA

Zachary Slepian and Jiamin Hou

  • Department of Astronomy, University of Florida, 211 Bryant Space Science Center, Gainesville, Florida 32611, USA and Max-Planck-Institut für Extraterrestische Physik, Postfach 1312, Giessenbachstr., 85748 Garching, Germany

  • *rncahn@lbl.gov

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Vol. 130, Iss. 20 — 19 May 2023

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