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The bispectrum of reconstructed CMB lensing convergence

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Gravitational lensing of the cosmic microwave background (CMB) is a powerful probe of cosmology, providing valuable information on the gravitational potential of large scale structure. The power spectrum of CMB lensing convergence has been used to help constrain cosmological parameters. The lensing bispectrum is expected to be detectable in forthcoming CMB experiments such as the Simons Observatory and this signal has the potential to significantly improve constraints on cosmological parameters, for example the sum of neutrino masses, the matter density and the amplitude of primordial fluctuations. In this talk I will describe work on understanding the bias terms present in the reconstructed bispectrum of CMB lensing convergence.

This talk is part of the Institute of Astronomy Seminars series.

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