# Assess the neutrino mass with micro and macro calorimeter approach

## TL;DR

This paper reviews the use of advanced calorimeter and bolometer techniques in low temperature detectors to measure neutrino mass and search for neutrinoless double beta decay, highlighting recent progress and potential for future experiments.

## Contribution

It presents an overview of the development and application of low temperature calorimeters in neutrino mass measurement and neutrinoless double beta decay searches, emphasizing recent technical advances.

## Key findings

- Calorimeters provide high energy resolution for neutrino experiments.
- Progress in low temperature detector technology enhances sensitivity.
- Scalable detector designs enable diverse neutrino physics applications.

## Abstract

Thanks to oscillation experiments it is now an established fact that neutrinos are massive particles. Yet, the assessment of neutrinos absolute mass scale is still an outstanding challenge in particle physics and cosmology as oscillation experiments are sensitive only to the squared mass differences of the three neutrino mass eigenstates. The mass hierarchy is not the only missing piece in the puzzle. Theories of neutrino mass generation call into play Majorana neutrinos and there are experimental observations pointing toward the existence of sterile neutrinos in addition to the three weakly interacting ones. Three experimental approaches are currently pursued: an indirect neutrino mass determination via cosmological observables, the search for neutrinoless double $\beta$-decay, and a direct measurement based on the kinematics of single $\beta$ or electron capture decays. Bolometers and calorimeters are low temperature detectors used in many applications, such as astrophysics, fast spectroscopy and particle physics. In particular, sensitive calorimeters play an important role in the neutrino mass measurement and in the search for the neutrinoless double $\beta$-decay. There has been great technical progress on low temperature detectors since they were proposed for neutrino physics experiments in 1984. This general detector paradigm can be implemented in devices as small as a micrometer for sub eV radiation or as large as 1 kg for MeV scale particles. Today this technique offers the high energy resolution and scalability required for leading edges and competitive experiments addressing the still open questions in neutrino physics.