Measurement of the muon neutrino charged current pion production cross-section on water using the T2K near detector
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T2K is a long baseline neutrino experiment which uses a beam of muon neutrinos,
produced at J-PARC and detected at Super-Kamiokande, to study
the neutrino oscillation parameters. The measurement of cross-sections in
the T2K energies can constrain the uncertainties on the model predictions
and help the oscillation analyses reach the necessary sensitivity to measure
CP violation in the lepton sector.
This thesis describes the measurement of the CC1 + cross-section in
water using Run II-IV T2K data. The T2K near detector, ND280, is used
to select a sample of CC1 + events having vertices in the water layers of
the downstream ne-grained detector (FGD). The Time Projection Chambers
(TPC) are used for the particle identi cation and to measure their
momenta. The Electromagnetic Calorimeters (ECals) are used to reject
events that produce electromagnetic showers coming from neutral pions. A
Bayesian unfolding method with background subtraction and two control
samples is used to extract the cross-section. The control samples constrain
the background coming from interactions on carbon and deep inelastic scattering.
The single di erential cross-section is presented as a function of the
muon kinematics, the pion kinematics, the angle between the muon and the
pion, and the reconstructed neutrino energy.
A future long baseline experiment between J-PARC and Hyper-Kamiokande
is presented as a natural continuation to the T2K experiment. Hyper-
Kamiokande will be a next generation water Cherenkov detector with a
total ( ducial) mass of 0.99 (0.56) million metric tons. A total exposure of
7.5MW 107 sec integrated beam power will lead to the measurement of
CP to better than 19 degrees for all possible values of CP . CP violation
in the lepton sector could be established at better than 3 (5 ) for 76%
(58%) of the CP parameter space.
Authors
Cremonesi, LindaCollections
- Theses [3834]