An Analysis of the Oscillation of Atmospheric Neutrinos

Tobayama, Shimpei

doi:10.14288/1.0340615

An Analysis of the Oscillation of Atmospheric Neutrinos

Shimpei Tobayama
(
- British Columbia U.
)

2016

200 pages

Supervisor:

Hiro Tanaka

Thesis: PhD

British Columbia U.

(2016)

Published: 2016

DOI:

10.14288/1.0340615

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Abstract: (British Columbia U.)

This thesis presents an analysis of the oscillation of atmospheric neutrinos observed in Super-Kamiokande, a large underground water Cherenkov detector in Japan. The observed atmospheric neutrino events are reconstructed and selected using a newly developed maximum likelihood event reconstruction algorithm, and a Markov chain Monte Carlo technique is employed to present the results on neutrino oscillation parameters as marginalized Bayesian posterior probabilities. The result of analyzing the SK-IV data of 2520 days exposure shows a preference for normal mass hierarchy with the posterior probability of 85.9%, and the mode and the 68% credible interval of each oscillation parameter’s marginalized 1D posterior probability distribution for normal hierarchy are sin² θ₂₃=0.606⁺⁰·⁰⁴⁴₋₀.₁₁₈ and Δm²₃₂=2.13⁺⁰·¹⁷₋₀.₃₈ ×10-³ eV².

thesis
neutrino: atmosphere
neutrino: oscillation
neutrino: mixing angle
neutrino: mass difference
Monte Carlo: Markov chain
Cherenkov counter: water
mass: hierarchy
neutrino: detector
deep underground detector

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Figures(0)

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