Final PhD Oral Examination (Thesis Title: “An Analysis of the Oscillation of Atmospheric Neutrinos”)

Speaker: 
SHIMPEI TOBAYAMA
Event Date and Time: 
Fri, 2016-12-16 12:30 - 14:30
Location: 
Room 203, Graduate Student Centre
Local Contact: 
Physics and Astronomy, UBC
Intended Audience: 
Public

Abstract:
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%. The
mode and the 68% credible interval of the marginalized 1D posterior probability
distribution of the mixing angle parameter sin2θ23 and the mass splitting Δm232 for
normal hierarchy are sin2θ23=0.606+0.044-0.118 and Δm232=2.13+0.17-0.38 ×10-3 eV2.

Website development by Checkmark Media. Designed by Armada.

a place of mind, The University of British Columbia

Faculty of Science
Department of Physics and Astronomy
6224 Agricultural Road
Vancouver, BC V6T 1Z1
Tel 604.822.3853
Fax 604.822.5324

Emergency Procedures | Accessibility | Contact UBC | © Copyright The University of British Columbia