Chappell, Andrew (2019) CP violation and neutrino mass ordering at the T2K experiment. PhD thesis, University of Warwick.

Preview

PDF WRAP_Theses_Chappell_2019.pdf - Submitted Version - Requires a PDF viewer. Download (7Mb) | Preview

Request Changes to record.

Abstract

T2K is a long baseline neutrino oscillation experiment studying the oscillation of Vμ to Ve over the 295 km baseline between the J-PARC accelerator and the Super-Kamiokande water Cherenkov detector.

A 3-flavour, 5 sample v/v joint analysis on the Run 1-9 dataset is performed to measure the neutrino CP phase, ꝺ, where values other than zero and nπ imply a difference in the oscillation of neutrinos and antineutrinos. The 2σ confidence level allowed interval when applying the constraint on sin2(Ɵ13) from reactors in normal mass ordering is [-2:966;-0:628] and for inverted mass ordering is [-1:799;-0:979]. Thus, CP conservation is rejected at 2σ, a world leading measurement.

Differences in event rates are expected for different true values of the neutrino mass ordering and thus T2K has some sensitivity to the neutrino mass ordering. A 3-flavour, 5 sample v/v joint analysis on the Run 1-9 dataset is performed to measure the neutrino mass ordering. No strong evidence against either mass ordering hypothesis is observed.

Item Type:	Thesis or Dissertation (PhD)
Subjects:	Q Science > QC Physics
Library of Congress Subject Headings (LCSH):	CP violation (Nuclear physics), Neutrinos -- Mass, Oscillations -- Measurement
Official Date:	April 2019
Dates:	Date Event April 2019 UNSPECIFIED
Institution:	University of Warwick
Theses Department:	Department of Physics
Thesis Type:	PhD
Publication Status:	Unpublished
Supervisor(s)/Advisor:	Barker, Gary John ; Boyd, Steve B.
Format of File:	pdf
Extent:	xxiv, 163 leaves : illustrations, charts
Language:	eng

Request changes or add full text files to a record

Repository staff actions (login required)

View Item

Downloads