T2K: recent results and future prospects
Il giorno 1 luglio 2019, ore 14.30, nelle aule 2G26 e 2G27, il
Dr Ciro Riccio -assegnista di tipologia A- terrà un seminario sull'attività svolta a conclusione della sua annualità.
"T2K: recent results and future prospects"
T2K (Tokai to Kamioka) is a long-baseline neutrino oscillation experiment designed to measure (anti-)neutrino flavour oscillations using located in Japan. After the measurement of a non-zero value for the last unknown mixing angle, T2K has started a campaign to measure the phase 𝛿, unknown element of the Pontecorvo Maki Nakagata Sakata, that can provide a test of the violation or conservation of the CP symmetry in the leptonic sector. The most recent result obtained combining data taken with a neutrino and antineutrino beam showed that the CP-conserving cases are excluded at 2𝜎 confidence level. One of the largest systematic uncertainties in neutrino oscillation analysis comes from present limited knowledge of (anti-)neutrino-nucleus interactions. Neutrino scattering understanding is crucial for the interpretation of neutrino oscillation since it affects background estimation and neutrino energy reconstruction. Thus, precise (anti-)neutrino-nucleus cross section measurements are vital for the present and future long-baseline neutrino oscillation experiments. The T2K Collaboration has a wide program of such measurements. In this presentation the recent T2K result on oscillation parameters and cross section are reported. In conclusion, the ongoing activities in preparation for the future project Hyper-Kamiokande that has as goals more precise measurements of the oscillation parameters will be discussed.