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First Search for eV-Scale Sterile Ne...

Norcini, Danielle .

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First Search for eV-Scale Sterile Neutrinos and Precision Measurementof the 235U Antineutrino Spectrum with the PROSPECT Experiment.

Record Type:	Electronic resources : Monograph/item
Title/Author:	First Search for eV-Scale Sterile Neutrinos and Precision Measurementof the 235U Antineutrino Spectrum with the PROSPECT Experiment./
Author:	Norcini, Danielle .
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2019,
Description:	316 p.
Notes:	Source: Dissertations Abstracts International, Volume: 81-10, Section: B.
Contained By:	Dissertations Abstracts International81-10B.
Subject:	Particle physics. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=27540208
ISBN:	9798607315443

First Search for eV-Scale Sterile Neutrinos and Precision Measurementof the 235U Antineutrino Spectrum with the PROSPECT Experiment.
Norcini, Danielle .

First Search for eV-Scale Sterile Neutrinos and Precision Measurementof the 235U Antineutrino Spectrum with the PROSPECT Experiment. - Ann Arbor : ProQuest Dissertations & Theses, 2019 - 316 p.

Source: Dissertations Abstracts International, Volume: 81-10, Section: B.

Thesis (Ph.D.)--Yale University, 2019.

This item must not be sold to any third party vendors.

Since the first observation of their existence, reactors have played an important role in our understanding of neutrinos. Recent observations of the electron antineutrino flux and energy spectrum at low-enriched uranium (LEU) reactors disagree with model predictions. The flux deficit, known as the Reactor Antineutrino Anomaly, may indicate new physics in the form of a beyond-the-Standard Model, eV-scale sterile neutrino. This new type of matter would have a profound impact on fundamental physics and cosmology. The spectral deviations may be attributed to an incomplete understanding of antineutrino emission from fissile material. However, the insufficiencies in the nuclear models and the specific isotopic contributions are not yet clear.PROSPECT is a newly constructed experiment designed to unambiguously search for eV-scale sterile neutrino oscillations and to precisely measure the antineutrino emission from $.

ISBN: 9798607315443Subjects--Topical Terms:

3433269
Particle physics.
Subjects--Index Terms:

Neutrinos

First Search for eV-Scale Sterile Neutrinos and Precision Measurementof the 235U Antineutrino Spectrum with the PROSPECT Experiment.
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100 1 $a Norcini, Danielle . $3 3550277
245 1 0 $a First Search for eV-Scale Sterile Neutrinos and Precision Measurementof the 235U Antineutrino Spectrum with the PROSPECT Experiment.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2019
300 $a 316 p.
500 $a Source: Dissertations Abstracts International, Volume: 81-10, Section: B.
500 $a Advisor: Heeger, Karsten M.
502 $a Thesis (Ph.D.)--Yale University, 2019.
506 $a This item must not be sold to any third party vendors.
520 $a Since the first observation of their existence, reactors have played an important role in our understanding of neutrinos. Recent observations of the electron antineutrino flux and energy spectrum at low-enriched uranium (LEU) reactors disagree with model predictions. The flux deficit, known as the Reactor Antineutrino Anomaly, may indicate new physics in the form of a beyond-the-Standard Model, eV-scale sterile neutrino. This new type of matter would have a profound impact on fundamental physics and cosmology. The spectral deviations may be attributed to an incomplete understanding of antineutrino emission from fissile material. However, the insufficiencies in the nuclear models and the specific isotopic contributions are not yet clear.PROSPECT is a newly constructed experiment designed to unambiguously search for eV-scale sterile neutrino oscillations and to precisely measure the antineutrino emission from $.
520 $a {235}$U fission. Located at the Oak Ridge National Laboratory, antineutrinos are observed at distances of 7-9\\,m from the the 85\\,MW$_{\\mathrm{th}}$ highly-enriched uranium (HEU) High Flux Isotope Reactor (HFIR). PROSPECT uses inverse beta decay to identify antineutrino events in a harsh, near-surface background environment. To overcome this challenge, PROSPECT developed a novel, compact $.
520 $a 6$Li-loaded scintillator detector with efficient neutron tagging and particle identification capabilities. These features, combined with event topology reconstruction made possible by optical segmentation, allow an unprecedented level of background suppression to observe antineutrinos with high energy resolution.This thesis details the detector design, instrumentation development, and construction of the PROSPECT experiment at the Yale Wright Laboratory between 2014--2018. The detector calibration, event reconstruction, and performance are also discussed. With 33 (28)\\,days of reactor-on(-off) data at HFIR, the first search for eV-scale sterile neutrinos is presented. No sterile neutrino oscillations are observed within the sensitive parameter space ($\\Delta m.
520 $a 2_{41}$, $\\sin.
520 $a 22\heta_ $) and PROSPECT excludes the best-fit sterile neutrino hypothesis to the Reactor Antineutrino Anomaly at 2.2$\\sigma$ confidence level. With a slightly larger data set containing $>$31,000 antineutrino candidates, PROSPECT has produced the world-leading measurement of the $.
520 $a {235}$U spectrum with a signal-to-background ratio of 1.7 and 5\\%/$\\sqrt{E(\\mathrm{MeV})}$ energy resolution. The experimental data disagrees with the leading Huber HEU reactor antineutrino spectrum model. PROSPECT disfavors $.
520 $a {235}$U as the sole isotope responsible for the spectral deviations observed by LEU experiments at 2.1$\\sigma$ confidence level.
590 $a School code: 0265.
650 4 $a Particle physics. $3 3433269
650 4 $a Nuclear physics. $3 517741
653 $a Neutrinos
653 $a Oscillation
653 $a Reactor
653 $a Scintillator
653 $a Sterile
690 $a 0798
690 $a 0756
710 2 $a Yale University. $b Physics. $3 2101654
773 0 $t Dissertations Abstracts International $g 81-10B.
790 $a 0265
791 $a Ph.D.
792 $a 2019
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=27540208