Testing charge quantization with axion string-induced cosmic birefringence

Abstract

We demonstrate that the Peccei-Quinn-electromagnetic anomaly coefficient $\mathcal{A}$ can be directly measured from axion string-induced cosmic birefringence by applying scattering transform to the anisotropic polarization rotation of the cosmic microwave background. This breaks the degeneracy between $\mathcal{A}$ and the effective number of string loops in traditional inference analyses that are solely based on the spatial power spectrum of polarization rotation. Carrying out likelihood-based parameter inference on mock rotation realizations generated according to phenomenological string network models, we show that scattering transform is able to extract enough non-Gaussian information to clearly distinguish a number of discrete $\mathcal{A}$ values, for instance $\mathcal{A}=1/9,1/3,2/3$, in the ideal case of noise-free rotation reconstruction, and, to a lesser but interesting degree, at reconstruction noise levels comparable to that expected for the proposed CMB-HD concept. In the event of a statistical detection of cosmic birefringence by Stage III or IV CMB experiments, our technique can be applied to test the stringy nature of the birefringence pattern and extract fundamental information about the smallest unit of charge in theories beyond the Standard Model.

References in corpus (22)

• Axion Cosmology
• Cold and Fuzzy Dark Matter
• Cosmic strings
• Quintessence and the Rest of the World
• Cosmological Signature of New Parity-Violating Interactions
• The type IIB string axiverse and its low-energy phenomenology
• The number of cosmic string loops
• Axions from Strings: the Attractive Solution
• Studies of the motion and decay of axion walls bounded by strings
• Axion cosmology with long-lived domain walls
• A new approach to observational cosmology using the scattering transform
• Towards an Optimal Estimation of Cosmological Parameters with the Wavelet Scattering Transform
• On the assumption of Gaussianity for cosmological two-point statistics and parameter dependent covariance matrices
• On String Theory Expectations for Photon Couplings to Axion-Like Particles
• Constraining a spatially dependent rotation of the Cosmic Microwave Background Polarization
• Weak lensing scattering transform: dark energy and neutrino mass sensitivity
• A CMB Millikan Experiment with Cosmic Axiverse Strings
• CMB birefringence from ultra-light axion string networks
• Constraints on direction-dependent cosmic birefringence from Planck polarization data
• Searching for axion-like particles through CMB birefringence from string-wall networks
• Moduli Stabilisation and the Statistics of Axion Physics in the Landscape
• Probing cosmic strings by reconstructing polarization rotation of the cosmic microwave background

Cited by in corpus (1)

• A New Solution for the Observed Isotropic Cosmic Birefringence Angle and its Implications for the Anisotropic Counterpart through a Boltzmann Approach