Probing Lorentz-violating electrodynamics with CMB polarization

Abstract

We perform a comprehensive study of the signatures of Lorentz violation in electrodynamics on the Cosmic Microwave Background (CMB) anisotropies. In the framework of the minimal Standard Model Extension (SME), we consider effects generated by renormalizable operators, both CPT-odd and CPT-even. These operators are responsible for sourcing, respectively, cosmic birefringence and circular polarization. We propagate jointly the effects of all the relevant Lorentz-violating parameters to CMB observables and provide constraints with the most recent CMB datasets. We bound the CPT-even coefficient to $k_{F,E+B}<2.31\times 10^{-31}$ at 95\% CL. This improves previous CMB bounds by one order of magnitude. The limits we obtain on the CPT-odd coefficients, i.e. $|k_{(V)00}^{(3)}|<1.54\times 10^{-44}\mathrm{GeV}$ and $|{\mathbf{k}}_{\mathbf{AF}}|<0.74\times 10^{-44}\mathrm{GeV}$ at 95\% CL, are respectively one and two orders of magnitude stronger than previous CMB-based limits, superseding also bounds from non-CMB searches. This analysis provides the strongest constraints to date on CPT-violating coefficients in the minimal SME from CMB searches.

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Cited by in corpus (12)

• Probing Axions through Tomography of Anisotropic Cosmic Birefringence
• A New Solution for the Observed Isotropic Cosmic Birefringence Angle and its Implications for the Anisotropic Counterpart through a Boltzmann Approach
• Astrophysical and Cosmological Searches for Lorentz Invariance Violation
• Weak Gravitational Lensing in Ricci-Coupled Kalb-Ramond Bumblebee Gravity: Global Monopole and Axion-Plasmon Medium Effects
• Radiation from an Oscillating Dipole in the Presence of Photon-Sector CPT and Lorentz Violation
• Conversations in the dark: cross-correlating birefringence and LSS to constrain axions
• Constraining CPT-odd electromagnetic chiral parameters with pulsar timing
• CPT-Odd effects on the electromagnetic properties of charged leptons in the Standard Model Extension
• A measurement of atmospheric circular polarization with POLARBEAR
• Indications against dynamical CPT symmetry restoration in quantum gravity
• Limits on the Carroll-Field-Jackiw electrodynamics from geomagnetic data
• New constraints on CPT symmetry violation in charm mesons