Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion

Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advanced Study. Check the calendar for the meeting location. This week's meeting is at the Institute for Advanced Study. Attendees can bring their own lunch or stop at the IAS Dining Hall. The West Seminar room is in a building which is a short walk from the main dining area. ABSTRACT: I will discuss a technique to directly extract the matter power spectrum in different redshift bins from weak lensing measurements employing a quadratic estimator method. This method allows for optimizing the extraction with respect to features in multipole space and is also sensitive to redshift-dependent features. Massive neutrinos, for example, imprint both kinds of features in the matter power spectrum and hence also in the lensing power spectrum. I will show results from an application to state-of-the-art data from the Canada-France-Hawaii Telescope Lensing Survey (CFHTLenS) and discuss the constraints on cosmological parameters and neutrino mass.