Performances of a radial TPC for the detection of neutrinoless double beta decay

• Main Authors: Bouet, R, Busto, J, Cadiou, A, Charpentier, P, Charrier, D, Chapellier, M, Dastgheibi-Fard, A, Druillole, F, Hellmuth, P, Jollet, C, Kaizer, J, Kontul, I, Ray, P. Le, Gros, M, Lautridou, P, Macko, M, Meregaglia, A, Piquemal, F, Povinec, P, Roche, M
• Format: Journal Article
• Language: English
• Published: 06-11-2024
• Subjects: Physics - High Energy Physics - Experiment; Physics - Instrumentation and Detectors
• DOI: 10.48550/arxiv.2411.03722

To search for $\beta\beta0\nu$ decay with unprecedented sensitivity, the R2D2
collaboration is developing a radial time projection chamber with a fiducial
mass of half a ton of 136Xe 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 allow for the disentangling of the
sought-after signal from the background, and the projected sensitivity after
ten years of data taking yields a half-life limit exceeding $10^{27}$ years,
along with a constraint on the effective neutrino mass $m_{\beta\beta}$,
sufficient to exclude the inverted mass hierarchy region.