The search for CP violation in neutrino oscillations at T2K
<p>T2K is a long-baseline neutrino oscillation experiment, designed to study the oscillation of a high-intensity muon neutrino beam produced by the J-PARC ac- celerator facility. Neutrinos are detected 295 km downstream of the production point at Super-Kamiokande, a 50 kt water Cherenkov detec...
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| Format: | Thesis |
| Language: | English |
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2017
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| Summary: | <p>T2K is a long-baseline neutrino oscillation experiment, designed to study the oscillation of a high-intensity muon neutrino beam produced by the J-PARC ac- celerator facility. Neutrinos are detected 295 km downstream of the production point at Super-Kamiokande, a 50 kt water Cherenkov detector capable of differ- entiating between muon neutrino and electron neutrino events. Two beam configurations are possible at T2K, each used to create neutrino beams composed of predominantly neutrinos or anti-neutrinos. Comparisons of the disappearance of muon neutrinos and the appearance of electron neutrinos in the neutrino and anti-neutrino beams are used to measure the neutrino oscillation parameters.</p>
<p>Presented in this thesis are the results of many analyses designed to study various combinations of the Super-Kamiokande oscillation data sets. Analyses considering the antineutrino beam data sets found no substantial evidence for ν ̄e appearance in a ν ̄μ beam or ν ̄μ oscillation inconsistent with observed νμ oscillation. A combined study of all available Super-K oscillation samples measured the CP violating phase δCP and the sine square of the mixing angle θ(13).</p>
<p>This analysis excluded δCP = 0 at the 2σ confidence level under both normal and inverted ordering hypotheses and produced a constraint of -2.978 rad < δCP < -0.467 rad in the normal ordering hypothesis.</p> |
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