Speaker: Prof. Zack Slepian (Univ. of Florida)

Title: Parity Violation and the Galaxy 4-Point Correlation Function

Abstract: Recently we have shown that the galaxy 4-point correlation function, which measures an excess of quartets of galaxies over random, is sensitive to parity violation in our Universe's large-scale structure. It is fundamentally 3D and thus has a handedness even after averaging over orientations, in contrast to galaxy pair and triplet correlations. With this new observable we have detected parity violation at high statistical significance using the SDSS Baryon Oscillation Spectroscopic Survey's roughly 1 M galaxies. If confirmed, this would indicate new physics operant in the Universe's earliest moments. We have now done the same analysis on Dark Energy Spectroscopic Instrument (DESI)'s Y1 Luminous Red Galaxy sample, the successor to BOSS, and found intriguing results, which i will present in this talk.

• Date:
  May 23, 2025, 2 p.m. – 3 p.m.
  
  
• Location:

  AIP; Schwarzschildhaus, Lecture hall

  
  
• Contact:
  Sydney Barnes
  sbarnes@aip.de