Speaker
Description
This poster presents the most recent T2K oscillation analysis results using 3.78×10^21
protons on target (POT) and highlights the expected sensitivity to the neutrino oscillation
parameters for the forthcoming next generation experiment in Japan - Hyper-Kamiokande
(Hyper-K).
By employing advanced methods for neutrino interaction modeling and neutrino flux
prediction, T2K data are analyzed to refine measurements of neutrino oscillation parameters
and explore CP violation in the lepton sector of the Standard Model. It is the first T2K
oscillation analysis including data after Gd loading in Super-K corresponding to 0.17x10^21
POT for neutrino mode. In addition, it includes an improved detector covariance matrix and a
new decay electron selection cut for both MC and data selection at Super-Kamiokande. A
90% confidence interval for the dCP parameter ranging from -3.04 to -0.34, and the p-value
for inverted ordering hypothesis of 0.0603 are some of the obtained results.
Looking forward to the Hyper-K era, comprehensive sensitivity studies were conducted
using inputs from previous T2K analyses and a new frequentist fitter. These studies
demonstrate Hyper-K's potential to further constrain oscillation parameters, offering valuable
insights for precise measurement and CP violation discovery. For instance, sensitivity studies
for dCP indicate that, with a true dCP of -π/2, CP violation can be determined with a 5-sigma
confidence level after 2 years of Hyper-K operation, achieving approximately 22% precision
for the dCP parameter.
| Poster prize | Yes |
|---|---|
| Given name | Denis |
| Surname | Carabadjac |
| First affiliation | LLR |
| Second affiliation | CEA |
| Institutional email | dcarabadjac@llr.in2p3.fr |
| Gender | Male |
| Collaboration (if any) | T2K and Hyper-K |
