Author:
Yin Lu,Kochappan Joby,Ghosh Tuhin,Lee Bum-Hoon
Abstract
Abstract
Exciting clues to isotropic cosmic birefringence have recently been detected in the EB
cross-power spectra of the polarization data of the cosmic microwave background (CMB). Early Dark
Energy (EDE) models with a pseudoscalar field coupled to photons via a Chern-Simons term can be
used to explain this phenomenon, and can also potentially be used to simultaneously resolve the
H
0 tension. In this work we incorporate an early dark energy scalar field, including a
Chern-Simons coupling, into an existing Boltzmann solver and numerically recover the EB
cross-power spectrum for two models in the literature; the α-attractor, and the Rock `n'
Roll field. We find that both the models fit the EB spectra, and the EB spectra alone do not
possess sufficient constraining power to distinguish the two models based on current data.
Subject
Astronomy and Astrophysics
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献