A Test for Cosmological Parity Violation Using the 3D Distribution of
  Galaxies
  We show that the galaxy 4-Point Correlation Function (4PCF) 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 (NPCFs) and in determining the corresponding covariance
matrices make the search for parity violation in the 4PCF possible in current
and upcoming surveys such as those undertaken by Dark Energy Spectroscopic
Instrument (DESI), the $Euclid$ satellite, and the Vera C. Rubin Observatory
(VRO).
