A Caltech Library Service

Electron Neutrino Appearance in the MINOS Experiment


Orchanian, Mhair-Armen Hagop (2012) Electron Neutrino Appearance in the MINOS Experiment. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/T4JJ-BM32.


This thesis describes a search for νe appearance in the two-detector long-baseline MINOS neutrino experiment at Fermilab, based on a data set representing an exposure of 8.2 x 1020 protons on the NuMI target. The analysis detailed herein represents an increase in sensitivity to the θ13 mixing angle of approximately 25% over previous analyses, due to improvements in the event discriminant and fitting technique. Based on our observation, we constrain the value of θ13 further, finding 2sin2θ23 sin213 < 0.12 (0.20) at the 90% confidence level for δCP = 0 and the normal (inverted) neutrino mass hierarchy. The best-fit value is 2sin2θ23 sin213 = 0.041+0.047-0.031(0.079+0.071-0.053) under the same assumptions. We exclude the θ13 = 0 hypothesis at the 89% confidence level.

Item Type:Thesis (Dissertation (Ph.D.))
Subject Keywords:theta13 mass hierarchy CP violation appearance MINOS electron neutrino
Degree Grantor:California Institute of Technology
Division:Physics, Mathematics and Astronomy
Major Option:Physics
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Newman, Harvey B.
Thesis Committee:
  • Newman, Harvey B. (chair)
  • Porter, Frank C.
  • Weinstein, Alan Jay
  • Wise, Mark B.
Defense Date:9 May 2012
Record Number:CaltechTHESIS:05302012-124605015
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:7097
Deposited By: Mhair-Armen Orchanian
Deposited On:31 May 2012 20:23
Last Modified:26 Oct 2021 18:35

Thesis Files

PDF - Final Version
See Usage Policy.


Repository Staff Only: item control page