With or without ν\nu? Hunting for the seed of the matter-antimatter asymmetry

Collaboration
Apr 5, 2024
30 pages
e-Print:
Experiments:

Citations per year

202320242025094
Abstract: (arXiv)
The matter-antimatter asymmetry underlines the incompleteness of the current understanding of particle physics. Neutrinoless double-beta (0νββ0\nu \beta\beta) decay may help explain this asymmetry, while unveiling the Majorana nature of the neutrino. The CUORE experiment searches for 0νββ0\nu \beta\beta decay of 130^{130}Te using a tonne-scale cryogenic calorimeter operated at milli-kelvin temperatures. We report no evidence for 0νββ0\nu \beta\beta decay and place a lower limit on the half-life of T1/2_{1/2}>> 3.8 ×\times 1025^{25} years (90% C.I.) with over 2 tonne\cdotyear TeO2_2 exposure. The tools and techniques developed for this result and the 5 year stable operation of nearly 1000 detectors demonstrate the infrastructure for a next-generation experiment capable of searching for 0νββ0\nu \beta\beta decay across multiple isotopes.
  • calorimeter: cryogenics
  • matter: asymmetry
  • temperature: low
  • CUORE
  • (0neutrino)
  • stability
  • neutrino: Majorana
  • matter: antimatter
  • semileptonic decay
  • confidence limit