PIRSA:24110083

Probing Parity in the Cosmic Microwave Background (CMB)

(2024). Probing Parity in the Cosmic Microwave Background (CMB). Perimeter Institute. https://pirsa.org/24110083

Probing Parity in the Cosmic Microwave Background (CMB). Perimeter Institute, Nov. 26, 2024, https://pirsa.org/24110083 

          @misc{ pirsa_PIRSA:24110083,
            doi = {10.48660/24110083},
            url = {https://pirsa.org/24110083},
            author = {},
            keywords = {Cosmology},
            language = {en},
            title = {Probing Parity in the Cosmic Microwave Background (CMB)},
            publisher = {Perimeter Institute},
            year = {2024},
            month = {nov},
            note = {PIRSA:24110083 see, \url{https://pirsa.org}}
          }
Cyril Creque-Sarbinowski
Talk number
PIRSA:24110083
Collection
Talk Type
Subject
Abstract

Deviations from a parity-symmetric Universe would strongly signal the presence of new physics beyond the Standard Model. The lowest-order scalar observable sensitive to parity in a homogeneous and isotropic Universe is the connected four-point function of a given cosmological field. Geometrically, this function is described by a suitable average of this field over many tetrahedral configurations. As the CMB represents a spherical projection of three-dimensional curvature fluctuations, its four-point function serves as a unique, but potentially limited, probe of this fundamental symmetry. In this talk, I will discuss progress in rigorously understanding the CMB’s sensitivity to parity-violating physics from both early- and late-time sources.