A search for muon neutrino to electron neutrino oscillations in the MINOS Experiment

Ochoa-Ricoux, J. P.

doi:10.2172/970069

Cited by 2 publications

(3 citation statements)

References 108 publications

(200 reference statements)

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“…This next analysis will use a large library of Monte Carlo events which are matched to the data events through a method of image recognition in a way very similar to facial recognition software. This method has been shown to have a higher FOM compared to methods using ANNs [124].…”

Section: Extrapolation Systematics Signal ν Ementioning

confidence: 95%

“…The uncertainties in the oscillation parameters will also be taken into account in each of these pseudo experiments. A computationally efficient method was developed [124] which computes the uncertainty due to oscillations in the form of a systematic error, rather than requiring the full computation of the oscillation probability for each of the 10,000 pseudo experiments. This results in an algorithm that completes in roughly 20% of the time needed in the case where the full oscillation probability for each pseudo experiment is individually calculated.…”

Section: Uncertainties In Oscillation Parametersmentioning

confidence: 99%

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A Measurement of Electron Neutrino Appearance in the MINOS Experiment After Four Years of Data

Cavanaugh

2010

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This work attempts to measure or set a limit on sin 2 (2θ 13 ), the parameter which describes ν µ → ν e oscillations. The MINOS detectors at Fermilab are used to perform a search for the oscillations utilizing a beam of ν µ neutrinos created in the NuMI beamline by the collisions of 120 GeV protons with a carbon target. These collisions create π ± and K ± which are focused with magnetic horns, are allowed to decay, and result in a beam of ν µ in the energy range of 1 to 30 GeV. Two functionally identical steel-scintillator calorimetric detectors are utilized to measure the interactions of the generated neutrinos. A detector close to the NuMI beam, located 104 m underground and 1040 m from the target, is used to measure the properties of the neutrino beam, including the flux, composition, and energy spectrum. This information is used in part to generate a predicted spectrum of neutrinos in absence of ν µ → ν e oscillations in the detector located far from the target, at a distance of 705 m underground and 735.5 km from the target. An excess of predicted ν e charged current events in this far detector will be interpreted as ν µ → ν e oscillations, and a measurement of sin 2 (2θ 13 ) will be made using a Feldman-Cousins analysis.The measurement of ν µ → ν e requires the separation of ν e candidates from background events. New reconstruction software was developed with a focus on identifying ν e candidate events in order to reduce systematic errors. The event parameters measured by this software were used as an input to an artificial neutral network event discriminator.The details of this reconstruction software and the other steps of the analysis necessary to iii iv Abstract making the measurement will be discussed.This work builds on a previous measurement made with this experiment. After two years of running with 3.14 × 10 20 protons-on-target (POT), a limit was set at δ CP = 0 for the normal (inverted) hierarchy of sin 2 (2θ 13 ) < 0.29 (0.42) at 90% C.L. This study finds after four years of data with an accumulated intensity of 7 × 10 20 POT that sin 2 (2θ 13 ) < 0.12 (0.20) with δ CP = 0 at 90% C.L. for the normal (inverted) hierarchy.

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Section: Extrapolation Systematics Signal ν Ementioning

confidence: 95%

Section: Uncertainties In Oscillation Parametersmentioning

confidence: 99%

A Measurement of Electron Neutrino Appearance in the MINOS Experiment After Four Years of Data

Cavanaugh

2010

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“…MINOS ν e events are selected using library-event-matching (LEM) [75,76]. Each ν e event candidate is compared to a library of simulate signal and background events using the topology of the energy deposition.…”

Section: Minos ν E Selectionmentioning

confidence: 99%

Three-Flavor Neutrino Oscillations with MINOS+

Carroll¹

2019

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The neutrino beam energy is classified as LE for low-energy, ME for medium-energy, and HE for high-energy. 43 5.1 MINOS+ beam focusing systematics. Omitting the baffle scrapping systematic which was found to be negligible.. .. .. .. 91 List of Figures 1.1 Measurements of the hadron production cross section around the Z resonance by the LEP experiments [5]. The curves are the predicted cross sections for two, three, and four neutrinos with Standard Model couplings and negligible mass.. .. .. . 2 1.2 Diagrams of charged-current (left) and neutral-current (right) vertices involving neutrinos of flavor α, ν α , and corresponding charged lepton, l − α. These diagrams were made using Tik Z

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A search for muon neutrino to electron neutrino oscillations in the MINOS Experiment

Cited by 2 publications

References 108 publications

A Measurement of Electron Neutrino Appearance in the MINOS Experiment After Four Years of Data

A Measurement of Electron Neutrino Appearance in the MINOS Experiment After Four Years of Data

Three-Flavor Neutrino Oscillations with MINOS+

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