Speaker
Description
The T2K experiment is a long-baseline accelerator neutrino experiment that measures $\nu_e$ appearance and $\nu_\mu$ disappearance from the $\nu_\mu$ beam by observing neutrino events at the near and far detectors. The near detector (ND280) stands 280 metres, and the far detector (Super Kamiokande) stands 295 km away from the beam production target. Super Kamiokande (SK) is a 50 kton water-Cherenkov detector that observes Cherenkov rings from charged particles produced in neutrino interactions with water.
In the present oscillation analyses, T2K uses only single-ring events at SK which are mostly CCQE. Charged-current single $\pi^+$ events form the second most dominant signal events in $\nu_e$ appearance studies. Thus, the addition of a two-ring CC$1\pi^+$ sample which consists of 1$e$-like ring and 1$\pi^+$-like ring can increase the statistics. These events will also help in studying $\delta_{CP}$ and the octant of $\theta_{23}$. In my studies, I will explore the properties and selection of 2-ring CC$1\pi^+$ events and how they will impact the statistics of $\nu_e$ appearance in T2K analysis.
