Dr. Shouvik Roy Choudhury

We update constraints on cosmological parameters in a 12-parameter model, which extends the standard 6-parameter ¿CDM to include dynamical dark energy and massive neutrinos, along with other new parameters. We use the latest Planck PR4 (2020) likelihoods, DESI DR1 & DR2 BAO, and the latest uncalibrated type Ia Supernovae (SNe) datasets. In this talk, I will discuss the implications for dynamical dark energy in such an extended model, and at the same time, provide robust bounds on neutrino masses which will be useful for the astro- and particle physics communities. I will also discuss the current status of the weak lensing tension and the Hubble tension in this extended cosmology. Based on arXiv: 2409.13022, arXiv: 2504.15340, and arXiv: 2509.26144 (all three published in the Astrophysical Journal Letters).