Sensitivity of the CUORE detector to $14.4$ keV solar axions emitted by the M1 nuclear transition of$~^{57}$Fe

TL;DR

This paper evaluates CUORE's potential to detect 14.4 keV solar axions from $^{57}$Fe, providing a model-independent limit on axion couplings using detailed simulations and realistic detector parameters.

Contribution

It presents the first detailed sensitivity calculation of CUORE to solar axions via inverse Bragg-Primakoff conversion, incorporating density functional theory and Monte Carlo simulations.

Findings

Expected limit on axion-photon and axion-nucleon coupling product: < 1.105×10^{-16} /GeV

Sensitivity applicable to axion masses below 500 eV at 95% confidence

Demonstrates CUORE's potential for axion detection with realistic background and resolution

Abstract

In this paper we present a calculation of the sensitivity of the CUORE detector to the monoenergetic $14.4$ keV solar axions emitted by the M1 nuclear transition of$~^{57}$Fe in the Sun and detected by inverse coherent Bragg-Primakoff conversion in single-crystal $TeO_2$ bolometers. The expected counting rate is calculated using density functional theory for the electron charge density of $TeO_2$ and realistic background and energy resolution of CUORE. Monte Carlo simulations for $5$ y $\times$ $741$ kg=$3705-$kg$\cdot$y of exposure are analyzed using time correlation of individual events with the theoretical time-dependent counting rate. We find an expected model-independent limit on the product of the axion-photon coupling and the axion-nucleon coupling $g_{a\gamma\gamma}g_{aN}^{\text{eff}}<1.105\times 10^{-16}$ /GeV for axion masses less than 500 eV with $95\%$ confidence level.