| Name: Abhishek Naskar Affiliation: Indian Institute of Technology Bombay Conference ID: ASI2023_537 Title : A Unified EFT Approach to Understand Primordial Magnetogenesis Authors and Co-Authors : Ashu Kushwaha, Abhishek Naskar, Debottam Nandi, S. Shankaranarayanan Abstract Type : Oral Abstract Category : General Relativity and Cosmology Abstract : Observations indicate a detectable amount of magnetic field at astrophysical and cosmological scales. This observed magnetic field can find its origin in the early Universe. If the inflationary background is considered, breaking conformal symmetry is required to generate a sufficient amount of magnetic field. Usually, conformal breaking is introduced by coupling between the electromagnetic field and the inflation field or by including higher derivative terms. We propose an Effective Field Theory (EFT) approach to unify these different approaches in the literature. We show that the generation of primordial magnetic fields requires two conditions: conformal invariance breaking and causal propagation. Based on Arxiv: 2207.05162 [gr-qc] |