Future prospects on constraining neutrino cosmology with the Ali CMB Polarization Telescope

TL;DR

This paper forecasts how the Ali CMB Polarization Telescope could improve constraints on neutrino properties using simulated CMB data, highlighting the impact of instrumental parameters and survey strategies.

Contribution

It provides the first detailed forecast of neutrino parameter constraints achievable with AliCPT, considering instrumental and survey design factors.

Findings

AliCPT could achieve (N_{ ext{eff}})=0.42 and (M_{ u})=0.18 in its first year

Large aperture and extensive sky coverage significantly improve constraints

Instrumental parameters like noise and FWHM affect the precision of neutrino measurements

Abstract

We forecast the constraints on the parameters of neutrino physics with the constructions of Cosmic Microwave Background (CMB) temperature, E-mode polarization and lensing spectra for the ground-based Ali Cosmic Microwave Background Polarization Telescope (AliCPT). To implement the forecast calculations, we perform numerical simulations which show that AliCPT would yield the result $\sigma (N_{\mathrm{eff}})=0.42$ and $\sigma (M_{\nu})=0.18$ for the first year observation. Moreover, we investigate how the instrumental parameters, such as noise level, full width at half maxima (FWHM), and sky coverage can affect the constraints on these two parameters. Our forecasting results find that a large aperture telescope with a large sky survey strategy would significant improve the current constraints.