서브메뉴
검색
Measuring Neutrino Oscillations With NOvA and T2K
Measuring Neutrino Oscillations With NOvA and T2K
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202104754
- ISBN
- 9798290653433
- DDC
- 539.721
- 서명/저자
- Measuring Neutrino Oscillations With NOvA and T2K
- 발행사항
- [Sl] : California Institute of Technology, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 139 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-03, Section: B.
- 주기사항
- Advisor: Patterson, Ryan.
- 학위논문주기
- Thesis (Ph.D.)--California Institute of Technology, 2025.
- 초록/해제
- 요약The discoveries of the twentieth century proved that neutrinos have mass and can change flavor. For the past few decades, a major focus of research has been the measurement of the physical parameters which govern this flavor oscillation. These measurements remain inconclusive on a few key questions, including the ordering of the neutrino masses and whether neutrinos violate \uD835\uDC36\uD835\uDC43 symmetry. NOvA and T2K are two long-baseline accelerator neutrino experiments working in this space. By placing detectors in a beam of muon (anti-)neutrinos, these experiments interrogate neutrino oscillations by measuring (-)\uD835\uDF08\uD835\uDF07 disappearance and (-)\uD835\uDF08\uD835\uDC52 appearance. The complementarity of NOvA's and T2K's oscillation measurements motivated the experiments to pursue a joint oscillation analysis. After bracketing the potential impacts of correlations between the two experiments' systematic uncertainties and constructing a joint likelihood function, we share in this thesis the first results from the NOvA-T2K joint oscillation analysis. We report the world's most precise measurement of Δ\uD835\uDC5A232 to date: +2.429+0.039−0.035 (−2.477 ± 0.035) x 10−3 eV2 assuming the normal (inverted) mass ordering, showing a slight preference for the inverted mass ordering. The maximally \uD835\uDC36\uD835\uDC43- violating value of \uD835\uDEFF\uD835\uDC36\uD835\uDC43 = + \uD835\uDF0B/2 is excluded by 3\uD835\uDF0E credible intervals, and if we assume neutrinos are in the inverted mass ordering, we see evidence of \uD835\uDC36\uD835\uDC43 violation at 3\uD835\uDF0E.Additionally, we present an effort to encapsulate neutrino cross-section models in a parametrization-agnostic way. We have created a suite of systematic parameters that are capable of mimicking the action of NOvA's cross-section model. This method could be used in a future joint data analysis between long-baseline neutrino experiments. We also introduce Voronoi histograms, an ancillary technique developed as part of this program. Voronoi histograms are a new way to efficiently bin high-dimensional data. This method preserves bin density in regions of interest, while tightly controlling the total number of bins used. The performance gains from using Voronoi binning's over standard rectangular binning's scale dramatically with the dimensionality of the data.
- 일반주제명
- Neutrinos
- 일반주제명
- Cosmic rays
- 일반주제명
- Energy
- 일반주제명
- Particle physics
- 키워드
- Cosmic rays
- 기타저자
- California Institute of Technology Physics Mathematics and Astronomy
- 기본자료저록
- Dissertations Abstracts International. 87-03B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
008260126s2025 us c eng d■001000017358805
■00520260202104754
■006m o d
■007cr#unu||||||||
■020 ▼a9798290653433
■035 ▼a(MiAaPQ)AAI32151371
■035 ▼a(MiAaPQ)Caltech17342
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a539.721
■1001 ▼aRaj, Varun Ranga.
■24510▼aMeasuring Neutrino Oscillations With NOvA and T2K
■260 ▼a[Sl]▼bCalifornia Institute of Technology▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a139 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-03, Section: B.
■500 ▼aAdvisor: Patterson, Ryan.
■5021 ▼aThesis (Ph.D.)--California Institute of Technology, 2025.
■520 ▼aThe discoveries of the twentieth century proved that neutrinos have mass and can change flavor. For the past few decades, a major focus of research has been the measurement of the physical parameters which govern this flavor oscillation. These measurements remain inconclusive on a few key questions, including the ordering of the neutrino masses and whether neutrinos violate \uD835\uDC36\uD835\uDC43 symmetry. NOvA and T2K are two long-baseline accelerator neutrino experiments working in this space. By placing detectors in a beam of muon (anti-)neutrinos, these experiments interrogate neutrino oscillations by measuring (-)\uD835\uDF08\uD835\uDF07 disappearance and (-)\uD835\uDF08\uD835\uDC52 appearance. The complementarity of NOvA's and T2K's oscillation measurements motivated the experiments to pursue a joint oscillation analysis. After bracketing the potential impacts of correlations between the two experiments' systematic uncertainties and constructing a joint likelihood function, we share in this thesis the first results from the NOvA-T2K joint oscillation analysis. We report the world's most precise measurement of Δ\uD835\uDC5A232 to date: +2.429+0.039−0.035 (−2.477 ± 0.035) x 10−3 eV2 assuming the normal (inverted) mass ordering, showing a slight preference for the inverted mass ordering. The maximally \uD835\uDC36\uD835\uDC43- violating value of \uD835\uDEFF\uD835\uDC36\uD835\uDC43 = + \uD835\uDF0B/2 is excluded by 3\uD835\uDF0E credible intervals, and if we assume neutrinos are in the inverted mass ordering, we see evidence of \uD835\uDC36\uD835\uDC43 violation at 3\uD835\uDF0E.Additionally, we present an effort to encapsulate neutrino cross-section models in a parametrization-agnostic way. We have created a suite of systematic parameters that are capable of mimicking the action of NOvA's cross-section model. This method could be used in a future joint data analysis between long-baseline neutrino experiments. We also introduce Voronoi histograms, an ancillary technique developed as part of this program. Voronoi histograms are a new way to efficiently bin high-dimensional data. This method preserves bin density in regions of interest, while tightly controlling the total number of bins used. The performance gains from using Voronoi binning's over standard rectangular binning's scale dramatically with the dimensionality of the data.
■590 ▼aSchool code: 0037.
■650 4▼aNeutrinos
■650 4▼aCosmic rays
■650 4▼aEnergy
■650 4▼aParticle physics
■653 ▼aNeutrino oscillation
■653 ▼aCosmic rays
■690 ▼a0798
■690 ▼a0791
■71020▼aCalifornia Institute of Technology▼bPhysics, Mathematics and Astronomy.
■7730 ▼tDissertations Abstracts International▼g87-03B.
■790 ▼a0037
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17358805▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


