Neutrino Oscillations Analysis at the T2K experiment including studies of new uncertainties on interactions involving final state hadrons
File(s)
Author(s)
Atkin, Edward Thomas
Type
Thesis
Abstract
The Tokai to Kamioka (T2K) experiment is a long-baseline neutrino experiment based in Japan.
The experiment aims to make precise measurements of neutrino oscillation parameters.
To make these measurements the T2K experiments utilises the Japan Proton Accelerator Research Complex (JPARC) which produces an intense neutrino beam.
This neutrino beam is aimed across Japan towards the Super-Kamiokande (SK) detector on West coast of Japan, 295km away from JPARC.
Properties of the unoscillated neutrino beam are constrained by a series of near detectors at the JPARC site: ND280 and INGRID.
The measurements of the unoscillated and oscillated neutrino beam allow the T2K experiment to measure neutrino oscillation parameters.
The general approach of the T2K oscillation analysis strategy will be described as well as the Markov Chain Monte Carlo methods and Bayesian techniques used by the MaCh3 analysis framework which was used for the analysis.
An important part of measuring neutrino oscillation parameters accurately is assigning appropriate systematic uncertainties.
One of the largest sources of systematic uncertainty for the T2K experiment comes from the simulation of neutrino interactions.
A more sophisticated treatment of systematic uncertainties related to Charged Current (CC) interactions producing multiple pions (CC MPi) and CC Deep Inelastic Scattering interactions (CC DIS) has been developed as part of the improvements to the T2K oscillation analysis.
A better description of the uncertainties associated with these interactions is desired for including higher energy data samples into the T2K oscillation analysis.
The latest results on neutrino oscillation parameters from the T2K experiment are shown.
This analysis uses the full run 1-10 dataset as well as significantly improved systematic uncertainties.
To make more precise statements about neutrino oscillation parameters in the future the T2K experiment will need to reduce the statistical uncertainty on them.
One way to do this is by adding more data samples at SK into the analysis.
The sensitivity of the T2K experiment with the addition of a sample targeting muon neutrino interactions with final state charged pions will be presented.
This sample has the potential to improve the sensitivity of the analysis.
This new sample is also expected to contain significantly more CC MPi and CC DIS interactions than other samples used in the analysis.
The importance of the improved systematics that were developed for CC MPi and CC DIS interactions to this new sample will also be shown.
The experiment aims to make precise measurements of neutrino oscillation parameters.
To make these measurements the T2K experiments utilises the Japan Proton Accelerator Research Complex (JPARC) which produces an intense neutrino beam.
This neutrino beam is aimed across Japan towards the Super-Kamiokande (SK) detector on West coast of Japan, 295km away from JPARC.
Properties of the unoscillated neutrino beam are constrained by a series of near detectors at the JPARC site: ND280 and INGRID.
The measurements of the unoscillated and oscillated neutrino beam allow the T2K experiment to measure neutrino oscillation parameters.
The general approach of the T2K oscillation analysis strategy will be described as well as the Markov Chain Monte Carlo methods and Bayesian techniques used by the MaCh3 analysis framework which was used for the analysis.
An important part of measuring neutrino oscillation parameters accurately is assigning appropriate systematic uncertainties.
One of the largest sources of systematic uncertainty for the T2K experiment comes from the simulation of neutrino interactions.
A more sophisticated treatment of systematic uncertainties related to Charged Current (CC) interactions producing multiple pions (CC MPi) and CC Deep Inelastic Scattering interactions (CC DIS) has been developed as part of the improvements to the T2K oscillation analysis.
A better description of the uncertainties associated with these interactions is desired for including higher energy data samples into the T2K oscillation analysis.
The latest results on neutrino oscillation parameters from the T2K experiment are shown.
This analysis uses the full run 1-10 dataset as well as significantly improved systematic uncertainties.
To make more precise statements about neutrino oscillation parameters in the future the T2K experiment will need to reduce the statistical uncertainty on them.
One way to do this is by adding more data samples at SK into the analysis.
The sensitivity of the T2K experiment with the addition of a sample targeting muon neutrino interactions with final state charged pions will be presented.
This sample has the potential to improve the sensitivity of the analysis.
This new sample is also expected to contain significantly more CC MPi and CC DIS interactions than other samples used in the analysis.
The importance of the improved systematics that were developed for CC MPi and CC DIS interactions to this new sample will also be shown.
Version
Open Access
Date Issued
2022-04
Date Awarded
2023-03
Copyright Statement
Creative Commons Attribution NonCommercial Licence
License URL
Advisor
Wascko, Morgan
Dunne, Patrick
Sponsor
Science and Technology Facilities Council (Great Britain)
Publisher Department
Physics
Publisher Institution
Imperial College London
Qualification Level
Doctoral
Qualification Name
Doctor of Philosophy (PhD)