- Jan. 8, 2024, 2:00 pm US/Central
- Curia II
- Sai Chaitanya Tadepalli, U Wisconsin, Madison
- Host: Dylan Temples, dtemples@fnal.gov
Abstract: In this talk, we will present axionic blue-tilted isocurvature power spectra and its possible constraints/sensitivities from experiments. Firstly, we will discuss the strongly blue tilted (nI~4) isocurvature spectrum generated during inflation for the mass parameter region just when the quantum oscillator modes are starting to be underdamped. Interestingly, there exist parametric regions with a strong resonant spectral behavior that leads to rich isocurvature spectral shapes and large amplitude enhancements. These can be particularly interesting with observational consequences, especially in relation to PBH and GWs generated in certain models. Lastly, we will examine and forecast constraints/sensitivities for LSS experiments such as Euclid (upcoming) and MegaMapper (proposed) using EFTofLSS based perturbative techniques for a better theoretical error control. In the process we will comment upon the consistent renormalization requirements for mixed adiabatic and blue isocurvature primordial spectra.