Observation of __e Oscillation in the T2K Experiment [Paperback]

In this thesis theauthor contributes to the analysis of neutrino beam data collected between 2010and 2013 to identify ?_???_e  events at the Super-Kamiokande detector. In particular,the author improves the pionnucleus interaction uncertainty, which is one ofthe dominant systematic error sources in T2K neutrino oscillation measurement.In the thesis, the measurement of ?_???_e  oscillation in the T2K (Tokai toKamioka) experiment is presented and a new constraint on ?_CP is obtained. Thismeasurement and the analysis establish, at greater than 5? significance, theobservation of ?_???_{e  }oscillation for the first time in the world. Combiningthe T2K ?_???_{e  }oscillation measurement with the latest findings on oscillationparameters including the world average value of ?13 from reactor experiments,the constraint on the value of ?_CP at the 90% confidence level is obtained.This constraint on ?_CP is an important step towards the discovery of CPviolation in the lepton sector. 

Introduction.- Overview of the T2K experiment.- The Fine-Grained Detector.- Pion Interaction measurement at TRIUMF M11 Beamline.- Extraction of Pion Absorption and Charge Exchange Cross Section.- Improvement of pion interaction model.- Monte Carlo Simulation for the Oscillation Analysis.- Near Detector Measurement.- Far Detector Measurement.- Oscillation Analysis and Results.-  Conclusion.

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