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Title: Sterile Neutrino Searches in MINOS and MINOS+ Experiments

This dissertation presents the searches on sterile neutrinos using the data collected in MINOS+ Experiment from September 2013 to September 2014, and the full data set of MINOS Experiment collected from 2005 to 2012. Anomalies in short baseline experiments, such as LSND and MiniBooNE, showed hints of sterile neutrinos, a type of neutrino that does not interact with the Standard Model particles. In this work, two models are considered: 3+1 and large extra dimension (LED). In the 3+1 model, one sterile neutrino state is added into the standard oscillation scheme consisting of three known active neutrino states ve, vμ and vτ. In the LED model, sterile neutrinos arise as Kaluza-Klein (KK) states due to assumed large extra dimensions. Mixing between sterile and active neutrino states may modify the oscillation patterns observed in the MINOS detectors. Both searches yield null results. For 3+1, a combined fit of MINOS and MINOS+ data gives a stronger limit on θ24 in the range of 10-2 eV2 < Δm412 < 1 eV2 than previous experiments. For LED, with the complete MINOS data set, the size of extra dimensions is constrained to be smaller than ~ 0.35 μm at 90% C.L. in the limit of amore » vanishing lightest neutrino mass.« less
Authors:
 [1]
  1. Univ. of Texas, Austin, TX (United States)
Publication Date:
OSTI Identifier:
1212158
Report Number(s):
FERMILAB-THESIS--2015-06
TRN: US1601300
DOE Contract Number:
AC02-07CH11359
Resource Type:
Thesis/Dissertation
Research Org:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; NEUTRINOS; PARTICLE MODELS; KALUZA-KLEIN THEORY; MASS; CONFIGURATION MIXING; CROSS SECTIONS; DATA COVARIANCES; NEUTRINO OSCILLATION; NEUTRINO BEAMS; MUON NEUTRINOS; MUON ANTINEUTRINOS; ELECTRON NEUTRINOS; ELECTRON ANTINEUTRINOS