COLLOQUIUM Eiichiro Komatsu, MPA Garching

Tantalizing Hint of Cosmological Parity Violation in the Polarized Light of the CMB

The polarized light of the cosmic microwave background is sensitive to new physics that violates parity symmetry. In this presentation, we present a tantalizing hint of parity violation from the polarization data of two satellite missions, WMAP and Planck, with a statistical significance of 3 sigma. This signal has also been observed in recent data from the Atacama Cosmology Telescope. Taken together, there is evidence for a cosmological parity violation with a statistical significance of 4 sigma. If confirmed in the future with higher statistical significance, this finding would have profound implications for the elusive nature of dark matter and dark energy.

Talk in presence and via Zoom:

https://uni-hamburg.zoom.us/j/66006535328?pwd=aGkrSjJIYmZjK0VpYlpGL0ZrdHg2UT09