Description
The Tokai-to-Kamiokande (T2K) experiment is a Japan-based long-baseline neutrino experiment aimed at measuring neutrino oscillation parameters, and limiting the CP violation phase angle δCP . T2K has two main detector suites: the near detectors INGRID and ND280 that are designed to characterize the (anti)neutrino beam and measure interaction cross-sections, and the far detec- tor Super-Kamiokande (SK), which compares the incoming neutrino distribu- tion with model predictions in order to constrain the oscillation parameters. The current selection of muon neutrino charged-current interactions at ND280 employed for the oscillation analysis, only selects events with final-state forward- going muons. However, in the SK event selection there is no such angular re- quirement. In this poster, we propose a new selection to enlarge the angular acceptance to the full solid angle. Such improvement is possible by utilizing the Time-of-Flight (ToF), which is crucial to determining track directions, and Electromagnetic CALorimeters (ECAL), which plays a key role in reconstructing high-angle tracks that do not go through one of the time-projection chambers of ND280. This selection also features splitting according to proton and photon multiplicity to help constraining hardonic final states. Introducing such samples to the ND280 measurements will add many interesting neutrino interaction events to the sample, improve our constraining power on neutrino interaction model parameters, enhance comparison between ND280 data and SK data, and eventually reduce further the systematic uncer- tainties on the neutrino oscillation parameters.
| Collaboration | T2K |
|---|
