Muon Neutrino to Electron Neutrino Oscillation in NO$\nu$A

doi:https://doi.org/10.2172/1221367

Title: Muon Neutrino to Electron Neutrino Oscillation in NO$$\nu$$A

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Abstract

NOvA is a long-baseline neutrino oscillation experiment optimized for electron neu- trino ( e) appearance in the NuMI beam, a muon neutrino ( $$\nu$$ _μ ) source at Fermilab. It consists of two functionally identical, nearly fully-active liquid-scintillator tracking calorimeters. The near detector (ND) at Fermilab is used to study the neutrino beam spectrum and composition before oscillation, and measure background rate to the $$\nu$$ _e appearance search. The far detector, 810 km away in Northern Minnesota, observes the oscillated beam and is used to extract oscillation parameters from the data. NO$$\nu$$ A's long baseline, combined with the ability of the NuMI beam to operate in the anti- neutrino mode, makes NO$$\nu$$ A sensitive to the last unmeasured parameters in neutrino oscillations- mass hierarchy, CP violation and the octant of mixing angle 23. This thesis presents the search for e appearance in the first data collected by the NO A detectors from October 2013 till May 2015. Studies of the NuMI neutrino data collected in the NO A near detector are also presented, which show large discrepancies between the ND simulation and data. Muon- removed electron (MRE) events, constructed by replacing the muon in $$\nu$$ _μ charged cur- rent interactionsmore »« less

Authors:

Sachdev, Kanika ^[1]

Univ. of Minnesota, Minneapolis, MN (United States)

Publication Date:: 2015-08-01

Research Org.:: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)

Sponsoring Org.:: USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)

OSTI Identifier:: 1221367

Report Number(s):: FERMILAB-THESIS-2015-20

DOE Contract Number:: AC02-07CH11359

Resource Type:: Thesis/Dissertation

Country of Publication:: United States

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats


                    Sachdev, Kanika. Muon Neutrino to Electron Neutrino Oscillation in NO$\nu$A.  United States: N. p., 2015. 
        Web.  doi:10.2172/1221367.

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                    Sachdev, Kanika. Muon Neutrino to Electron Neutrino Oscillation in NO$\nu$A.  United States.  https://doi.org/10.2172/1221367

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                    Sachdev, Kanika. Sat .  
        "Muon Neutrino to Electron Neutrino Oscillation in NO$\nu$A".  United States.  https://doi.org/10.2172/1221367.  https://www.osti.gov/servlets/purl/1221367.

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@article{osti_1221367,

  title        = {Muon Neutrino to Electron Neutrino Oscillation in NO$\nu$A},

  author       = {Sachdev, Kanika},

  abstractNote = {NOvA is a long-baseline neutrino oscillation experiment optimized for electron neu- trino ( e) appearance in the NuMI beam, a muon neutrino ( $\nu$μ ) source at Fermilab. It consists of two functionally identical, nearly fully-active liquid-scintillator tracking calorimeters. The near detector (ND) at Fermilab is used to study the neutrino beam spectrum and composition before oscillation, and measure background rate to the $\nu$e appearance search. The far detector, 810 km away in Northern Minnesota, observes the oscillated beam and is used to extract oscillation parameters from the data. NO$\nu$ A's long baseline, combined with the ability of the NuMI beam to operate in the anti- neutrino mode, makes NO$\nu$ A sensitive to the last unmeasured parameters in neutrino oscillations- mass hierarchy, CP violation and the octant of mixing angle 23. This thesis presents the search for e appearance in the first data collected by the NO A detectors from October 2013 till May 2015. Studies of the NuMI neutrino data collected in the NO A near detector are also presented, which show large discrepancies between the ND simulation and data. Muon- removed electron (MRE) events, constructed by replacing the muon in $\nu$μ charged cur- rent interactions by a simulated electron, are used to correct the far detector $\nu$e appearance prediction for these discrepancies. In the analysis of the first data, a total of 6 e candidate events are observed in the far detector on a background of 1, a 3.46 σ excess, which is interpreted as strong evidence for e appearance. The results are consistent with our expectation, based on constraints from other neutrino oscillation experiments. The result presented here differs from the officially published $\nu$e appearance result from the NO A experiment where the systematic error is assumed to cover the MRE correction.},

  doi          = {10.2172/1221367},

  url          = {https://www.osti.gov/biblio/1221367},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {2015},

  month        = {8}

}

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