We present a new measurement of the 2v/3/3 half-life of 130Te (T2v 1=2) using the first complete model of the CUORE data, based on 1038 kg yr of collected exposure. Thanks to optimized data selection, we achieve a factor of two improvement in precision, obtaining T2v 1=2 1/4 (9.32 & thorn;0.05-0.04stat & thorn;0.07-0.07syst) x 1020 yr. The signal-to-background ratio is increased by 70% compared to our previous results, enabling the first application of the improved 2v/3/3 formalism to 130Te. Within this framework, we determine a credibility interval for the effective axial coupling in the nuclear medium as a function of nuclear matrix elements. We also extract values for the higher-order nuclear matrix element ratios: second-to-first and third-to-first. The second-to-first ratio agrees with nuclear model predictions, while the third-to-first ratio deviates from theoretical expectations. These findings provide essential tests of nuclear models and key inputs for future 0v/3/3 searches.
Half-life and precision shape measurement of the 2νββ decay of 130Te / Adams, D. q.; Alduino, C.; Alfonso, K.; Armatol, A.; Avignone, F. t.; Azzolini, O.; Bari, G.; Bellini, F.; Benato, G.; Beretta, M.; Biassoni, M.; Branca, A.; Brofferio, C.; Bucci, C.; Camilleri, J.; Caminata, A.; Campani, A.; Cao, J.; Capelli, C.; Capelli, S.; Cappelli, L.; Cardani, L.; Carniti, P.; Casali, N.; Celi, E.; Chiesa, D.; Clemenza, M.; Copello, S.; Cremonesi, O.; Creswick, R. j.; D'Addabbo, A.; Dafinei, I.; Dell'Oro, S.; Di Domizio, S.; Di Lorenzo, S.; Dixon, T.; Fang, D. q.; Faverzani, M.; Ferri, E.; Ferroni, F.; Fiorini, E.; Franceschi, M. a.; Freedman, S. j.; Fu, S. h.; Fujikawa, B. k.; Ghislandi, S.; Giachero, A.; Girola, M.; Gironi, L.; Giuliani, A.; Gorla, P.; Gotti, C.; Guillaumon, P. v.; Gutierrez, T. d.; Han, K.; Hansen, E. v.; Heeger, K. m.; Helis, D. l.; Huang, H. z.; Hurst, M. t.; Keppel, G.; Kolomensky, Yu. g.; Kowalski, R.; Liu, R.; Ma, L.; Ma, Y. g.; Marini, L.; Maruyama, R. h.; Mayer, D.; Mei, Y.; Moore, M. n.; Napolitano, T.; Nastasi, M.; Nones, C.; Norman, E. b.; Nucciotti, A.; Nutini, I.; O'Donnell, T.; Olmi, M.; Oregui, B. t.; Pagan, S.; Pagliarone, C. e.; Pagnanini, L.; Pallavicini, M.; Pattavina, L.; Pavan, M.; Pessina, G.; Pettinacci, V.; Pira, C.; Pirro, S.; Pottebaum, E. g.; Pozzi, S.; Previtali, E.; Puiu, A.; Quitadamo, S.; Ressa, A.; Rosenfeld, C.; Schmidt, B.; Serino, R.; Shaikina, A.; Sharma, V.; Singh, V.; Sisti, M.; Speller, D.; Surukuchi, P. t.; Taffarello, L.; Tomei, C.; Torres, A.; Torres, J. a.; Vetter, K. j.; Vignati, M.; Wagaarachchi, S. l.; Welliver, B.; Wilson, J.; Wilson, K.; Winslow, L. a.; Xie, F.; Zhu, T.; Zimmermann, S.; Zucchelli, S.; Castillo, D.; Kotila, J.; Menéndez, J.; Niţescu, O.; Šimkovic, F.; Null, Null. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 135:8(2025), pp. 1-7. [10.1103/jdhf-hn4l]
Half-life and precision shape measurement of the 2νββ decay of 130Te
Bellini, F.;Ressa, A.;Vignati, M.;
2025
Abstract
We present a new measurement of the 2v/3/3 half-life of 130Te (T2v 1=2) using the first complete model of the CUORE data, based on 1038 kg yr of collected exposure. Thanks to optimized data selection, we achieve a factor of two improvement in precision, obtaining T2v 1=2 1/4 (9.32 & thorn;0.05-0.04stat & thorn;0.07-0.07syst) x 1020 yr. The signal-to-background ratio is increased by 70% compared to our previous results, enabling the first application of the improved 2v/3/3 formalism to 130Te. Within this framework, we determine a credibility interval for the effective axial coupling in the nuclear medium as a function of nuclear matrix elements. We also extract values for the higher-order nuclear matrix element ratios: second-to-first and third-to-first. The second-to-first ratio agrees with nuclear model predictions, while the third-to-first ratio deviates from theoretical expectations. These findings provide essential tests of nuclear models and key inputs for future 0v/3/3 searches.| File | Dimensione | Formato | |
|---|---|---|---|
|
Adams_Half-life_2025.pdf
solo gestori archivio
Note: Articolo su rivista
Tipologia:
Versione editoriale (versione pubblicata con il layout dell'editore)
Licenza:
Tutti i diritti riservati (All rights reserved)
Dimensione
399.3 kB
Formato
Adobe PDF
|
399.3 kB | Adobe PDF | Contatta l'autore |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.


