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Measurement of Reactor Antineutrino Oscillation with SNO+
Measurement of Reactor Antineutrino Oscillation with SNO+
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211151351
- ISBN
- 9798382835488
- DDC
- 530
- 저자명
- Zummo, Anthony.
- 서명/저자
- Measurement of Reactor Antineutrino Oscillation with SNO+
- 발행사항
- [Sl] : University of Pennsylvania, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 191 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 85-12, Section: B.
- 주기사항
- Advisor: Klein, Joshua.
- 학위논문주기
- Thesis (Ph.D.)--University of Pennsylvania, 2024.
- 초록/해제
- 요약This thesis presents a few topics all related to the SNO+ experiment: improvements to the trigger system, measurements of backgrounds to a potential neutrinoless double beta decay (0νββ) signal, and a measurement of neutrino oscillation parameters using reactor antineutrinos. Two background analyses performed during the water and partial scintillator phases of SNO+ are presented. The first analysis measures the radioactive backgrounds from the external components of the detector in the SNO+ water phase. The second analysis investigates all backgrounds to a potential neutrinoless double beta decay signal in the SNO+ partial scintillator fill phase. Both analyses find backgrounds consistent with expectation. These background analyses also motivated improvements to the SNO+ trigger system. This includes additional trigger functionality and improvements minimizing the deadtime in the SNO+ trigger system. Finally, an analysis of reactor antineutrinos detected in 134.4 days of SNO+ data is presented. A fit of reactor antineutrino event candidates provides a measurement of ∆m221 = 7.96+0.48 −0.41 x 10−5 eV2 with local minima above and below the best fit value at 2σ significance. Combining this result with the existing global constraint from KamLAND gives a new value of ∆m221 = 7.59+0.18 −0.17 x10−5 eV2 , slightly higher than the previous best fit. In addition, the flux of geoneutrinos is measured to be 64 ± 44 TNU, consistent with expectation. The future sensitivities of these measurements with additional data are also presented. It is concluded that SNO+ expects to reach the current sensitivity in its measurement of ∆m221 with ∼4-5 years of livetime.
- 일반주제명
- Physics
- 일반주제명
- Particle physics
- 일반주제명
- Nuclear physics
- 일반주제명
- Theoretical physics
- 키워드
- Neutrino
- 키워드
- Oscillation
- 키워드
- Reactors
- 키워드
- SNO+
- 기타저자
- University of Pennsylvania Physics and Astronomy
- 기본자료저록
- Dissertations Abstracts International. 85-12B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
008250123s2024 us c eng d■001000017161398
■00520250211151351
■006m o d
■007cr#unu||||||||
■020 ▼a9798382835488
■035 ▼a(MiAaPQ)AAI31243213
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a530
■1001 ▼aZummo, Anthony.
■24510▼aMeasurement of Reactor Antineutrino Oscillation with SNO+
■260 ▼a[Sl]▼bUniversity of Pennsylvania▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a191 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 85-12, Section: B.
■500 ▼aAdvisor: Klein, Joshua.
■5021 ▼aThesis (Ph.D.)--University of Pennsylvania, 2024.
■520 ▼aThis thesis presents a few topics all related to the SNO+ experiment: improvements to the trigger system, measurements of backgrounds to a potential neutrinoless double beta decay (0νββ) signal, and a measurement of neutrino oscillation parameters using reactor antineutrinos. Two background analyses performed during the water and partial scintillator phases of SNO+ are presented. The first analysis measures the radioactive backgrounds from the external components of the detector in the SNO+ water phase. The second analysis investigates all backgrounds to a potential neutrinoless double beta decay signal in the SNO+ partial scintillator fill phase. Both analyses find backgrounds consistent with expectation. These background analyses also motivated improvements to the SNO+ trigger system. This includes additional trigger functionality and improvements minimizing the deadtime in the SNO+ trigger system. Finally, an analysis of reactor antineutrinos detected in 134.4 days of SNO+ data is presented. A fit of reactor antineutrino event candidates provides a measurement of ∆m221 = 7.96+0.48 −0.41 x 10−5 eV2 with local minima above and below the best fit value at 2σ significance. Combining this result with the existing global constraint from KamLAND gives a new value of ∆m221 = 7.59+0.18 −0.17 x10−5 eV2 , slightly higher than the previous best fit. In addition, the flux of geoneutrinos is measured to be 64 ± 44 TNU, consistent with expectation. The future sensitivities of these measurements with additional data are also presented. It is concluded that SNO+ expects to reach the current sensitivity in its measurement of ∆m221 with ∼4-5 years of livetime.
■590 ▼aSchool code: 0175.
■650 4▼aPhysics
■650 4▼aParticle physics
■650 4▼aNuclear physics
■650 4▼aTheoretical physics
■653 ▼aNeutrino
■653 ▼aOscillation
■653 ▼aReactors
■653 ▼aSNO+
■653 ▼aPartial scintillator phases
■690 ▼a0605
■690 ▼a0798
■690 ▼a0753
■690 ▼a0756
■71020▼aUniversity of Pennsylvania▼bPhysics and Astronomy.
■7730 ▼tDissertations Abstracts International▼g85-12B.
■790 ▼a0175
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17161398▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
