# 17th International Conference on Topics in Astroparticle and Underground Physics (TAUP 2021)

26 August 2021 to 3 September 2021

## Exposure-background duality in the searches of neutrinoless double beta decay

31 Aug 2021, 17:10
1h 30m
Talk in parallel session Neutrino physics and astrophysics

### Speaker

Manoj Kumar Singh (Institute of Physics, Academia Sinica)

### Description

Neutrinoless double-$\beta$ decay (0$\nu\beta\beta$) is an experimentally sensitive avenue to probe the nature (Majorana versus Dirac) and exact mass of neutrinos. This work [1] quantitatively explores the interplay between exposure and background levels in 0$\nu\beta\beta$ experiments at their design stage. In particular, background reduction will be playing increasingly important and investment-effective roles in future 0$\nu\beta\beta$ experiments. Although the primary goal of current running and projected experiments is to probe the inverted mass hierarchy, current neutrino oscillation experiments reveal a preference for non-degenerate (ND) normal mass hierarchy (NH). Therefore the strategy of scaling the summit of 0$\nu\beta\beta$ should also take this genuine possibility into account. Present work would explore the role of background suppression in alleviating the necessity of large exposure for future 0$\nu\beta\beta$ experiments with sensitivity goals of approaching and covering ND-NH. In particular, the roles of energy resolution in suppressing the irreducible background of 2$\nu\beta\beta$ will be discussed.

[1] M.K.Singh et al., Phys. Rev. D 101, 013006 (2020).

Reference to paper (DOI or arXiv) 10.1103/PhysRevD.101.013006

### Primary author

Manoj Kumar Singh (Institute of Physics, Academia Sinica)

### Co-author

Prof. Henry Tsz-King Wong (Institute of Physics, Academia Sinica)

### Presentation Materials

 Exposure background duality in the searches of neutrinoless double beta decay-Manoj Singh -TAUP2021 TAUP2021_TEXONO_MKSingh.pdf
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