https://doi.org/10.1140/epjc/s10052-025-14442-0
Regular Article - Experimental Physics
Simulation of a radial TPC for the detection of neutrinoless double beta decay
1
LP2I Bordeaux, Université de Bordeaux, CNRS/IN2P3, 33175, Gradignan, France
2
CPPM, Université d’Aix-Marseille, CNRS/IN2P3, 13288, Marseille, France
3
SUBATECH, IMT-Atlantique, Université de Nantes, CNRS-IN2P3, Nantes, France
4
IJCLab, CNRS/IN2P3, Paris, France
5
LPSC-LSM, CNRS/IN2P3, Université Grenoble-Alpes, Modane, France
6
IRFU, CEA, Université Paris-Saclay, 91191, Gif-sur-Yvette, France
7
IEAP, Czech Technical University in Prague, 11000, Prague, Czech Republic
8
Faculty of Mathematics, Physics and Informatics, Comenius University, Bratislava, Slovakia
a
pascal.lautridou@subatech.in2p3.fr
b
anselmo.meregaglia@cern.ch
Received:
6
November
2024
Accepted:
20
June
2025
Published online:
2
July
2025
To search for 
decay with unprecedented sensitivity, the R2D2 collaboration is developing a radial time projection chamber with a fiducial mass of half a tonne of 
Xe at high pressure. The various approaches implemented to eliminate the radioactive background are presented in terms of detector design, topological recognition of interactions, and event energy reconstruction. The developed tools enable the disentangling of the sought-after signal from the background. The projected sensitivity after ten years of data taking yields a half-life limit exceeding 
years, along with a constraint on the effective neutrino mass 
that could cover a large fraction of the inverted mass hierarchy region, depending on the final experimental background.
© The Author(s) 2025
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Funded by SCOAP3.
