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Searching for Planck-Scale Mass Dark Matter with SNO+
Searching for Planck-Scale Mass Dark Matter with SNO+
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202103152
- ISBN
- 9798280757875
- DDC
- 530
- 저자명
- Luo, Meng.
- 서명/저자
- Searching for Planck-Scale Mass Dark Matter with SNO+
- 발행사항
- [Sl] : University of Pennsylvania, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 87 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-12, Section: B.
- 주기사항
- Advisor: Klein, Joshua R.
- 학위논문주기
- Thesis (Ph.D.)--University of Pennsylvania, 2025.
- 초록/해제
- 요약This dissertation presents a search for Planck-scale mass dark matter with SNO+, a large liquid scintillator neutrino experiment. It begins with an overview of dark matter, summarizing its astrophysical and cosmological evidence, discussing two leading candidates-Weakly Interacting Massive Particle (WIMP) and Multiply Interacting Massive Particle (MIMP), with a particular focus on the latter-and reviewing detection strategies, especially direct detection experiments. An overview of the SNO+ experiment is then provided, along with a detailed description of its detector hardware and software, highlighting the energy calibration and systematic uncertainty evaluation using a 16N source during the water phase. Afterwards, a detailed study of MIMP propagation through the earth's overburden and the liquid scintillator for accurate simulation is presented, along with the expected signatures for a MIMP with mass mχ = 1019 GeV1 and spin-independent nucleon cross section σ SIχn = 5 x 10−27 cm2 . Relevant backgrounds, event tagging methods, and systematic uncertainties are also discussed. Over 134.4 live days of data, two candidate MIMP events were identified. Further investigation suggests these events likely originated from the detector neck, a background source not included in the original model. As a result, no statistically significant conclusion could be drawn for the MIMP model probed. Assuming no backgrounds are expected, dark matter models that predict 5.32 observed events in SNO+ can be excluded with these 2 observed events with 90% confidence level. Finally, the live time required to exclude the MIMP of interest at the 90% confidence level is projected, and several suggestions for improving tagging efficiency in future studies are proposed.
- 일반주제명
- Physics
- 일반주제명
- Astronomy
- 일반주제명
- Astrophysics
- 일반주제명
- Particle physics
- 키워드
- Cosmology
- 키워드
- Dark matter
- 키워드
- Neutrino
- 기타저자
- University of Pennsylvania Physics and Astronomy
- 기본자료저록
- Dissertations Abstracts International. 86-12B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520260202103152
■006m o d
■007cr#unu||||||||
■020 ▼a9798280757875
■035 ▼a(MiAaPQ)AAI31997226
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a530
■1001 ▼aLuo, Meng.
■24510▼aSearching for Planck-Scale Mass Dark Matter with SNO+
■260 ▼a[Sl]▼bUniversity of Pennsylvania▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a87 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-12, Section: B.
■500 ▼aAdvisor: Klein, Joshua R.
■5021 ▼aThesis (Ph.D.)--University of Pennsylvania, 2025.
■520 ▼aThis dissertation presents a search for Planck-scale mass dark matter with SNO+, a large liquid scintillator neutrino experiment. It begins with an overview of dark matter, summarizing its astrophysical and cosmological evidence, discussing two leading candidates-Weakly Interacting Massive Particle (WIMP) and Multiply Interacting Massive Particle (MIMP), with a particular focus on the latter-and reviewing detection strategies, especially direct detection experiments. An overview of the SNO+ experiment is then provided, along with a detailed description of its detector hardware and software, highlighting the energy calibration and systematic uncertainty evaluation using a 16N source during the water phase. Afterwards, a detailed study of MIMP propagation through the earth's overburden and the liquid scintillator for accurate simulation is presented, along with the expected signatures for a MIMP with mass mχ = 1019 GeV1 and spin-independent nucleon cross section σ SIχn = 5 x 10−27 cm2 . Relevant backgrounds, event tagging methods, and systematic uncertainties are also discussed. Over 134.4 live days of data, two candidate MIMP events were identified. Further investigation suggests these events likely originated from the detector neck, a background source not included in the original model. As a result, no statistically significant conclusion could be drawn for the MIMP model probed. Assuming no backgrounds are expected, dark matter models that predict 5.32 observed events in SNO+ can be excluded with these 2 observed events with 90% confidence level. Finally, the live time required to exclude the MIMP of interest at the 90% confidence level is projected, and several suggestions for improving tagging efficiency in future studies are proposed.
■590 ▼aSchool code: 0175.
■650 4▼aPhysics
■650 4▼aAstronomy
■650 4▼aAstrophysics
■650 4▼aParticle physics
■653 ▼aCosmology
■653 ▼aDark matter
■653 ▼aNeutrino
■653 ▼aNeutrino detector
■653 ▼aEnergy calibration
■690 ▼a0605
■690 ▼a0606
■690 ▼a0596
■690 ▼a0798
■71020▼aUniversity of Pennsylvania▼bPhysics and Astronomy.
■7730 ▼tDissertations Abstracts International▼g86-12B.
■790 ▼a0175
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17357231▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
