Progress on Old and New Themes in cosmology (PONT) 2023

Covariant Effective Action for Generalized Proca Theories

3 May 2023, 16:50

20m

Chambre du Trésorier (Palais des papes, Avignon)

Early Universe

Speaker

Dr Sukanta Panda (IISER Bhopal)

Description

We check quantum stability of the generalized Proca theories in curved spacetime by computing the quantum gravitational corrections using Vilkovisky- Dewitt formalism. First we consider a range of the coupling constants to maximize the predictability of EFT. We find that there exists a regime where classical nonlinearity dominates while quantum corrections are still suppressed protecting EFT at scales where the Vainshtein mechanism screens the extra degrees of freedom.

References:

1. Aashish, Sandeep & Panda, Sukanta & Tinwala, Abbas & Vidyarthi, Archit. (2021). Covariant effective action for scalar tensor theories of gravity, Journal of Cosmology and Astroparticle Physics, 10 (2021) 006

2. Panda, Sukanta & Tinwala, Abbas & Vidyarthi, Archit. (2021). Covariant effective action for Generalized Proca Theories, Journal of Cosmology and Astroparticle Physics 01 (2022) 01, 062

Presentation materials

sukantapont.pdf