서브메뉴
검색
A Measurement of Boosted Dibosons With Gaussian Process Background Modeling at the Atlas Detector
A Measurement of Boosted Dibosons With Gaussian Process Background Modeling at the Atlas Detector
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211151939
- ISBN
- 9798384024156
- DDC
- 593.7
- 저자명
- Xu, Riley.
- 서명/저자
- A Measurement of Boosted Dibosons With Gaussian Process Background Modeling at the Atlas Detector
- 발행사항
- [Sl] : University of Pennsylvania, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 180 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-02, Section: B.
- 주기사항
- Advisor: Lipeles, Elliot.
- 학위논문주기
- Thesis (Ph.D.)--University of Pennsylvania, 2024.
- 초록/해제
- 요약This dissertation presents a measurement of WW, W Z, and ZZ production in the semileptonic final state at the ATLAS detector. The measurement was performed using 139 fb−1 of √ s = 13 TeV proton-proton collisions collected at the Large Hadron Collider between 2015 and 2018. An innovative data-driven approach to model the V+jets background was investigated, using a Bayesian method called Gaussian process regression. The method, more commonly found in other disciplines and yet to see much adoption in high-energy physics, was established to be much more robust and precise than traditional approaches using functional fits. As the analysis is still blinded as of this publication, expected results are presented here instead. Differential fiducial cross sections are obtained in several variables, and a total sensitivity of around 10σ to the Standard Model process is expected. Expected limits on the Effective Field Theory coefficient cW are determined at approximately |cW /Λ 2 | 0.42 TeV−2 at the linear order and |cW /Λ 2 | 0.03 TeV−2 at the quadratic order. In addition to the diboson measurement, firmware, software, and algorithm developments on tracking in the trigger for the HL-LHC upgrade are presented. The highly increased pileup of the HL-LHC environment requires a much smarter trigger system to reject background events, and tracking enables more informed decisions. Two algorithms, a pattern matching method and a Hough transform approach, were implemented in a simulation framework and optimized for the HL-LHC environment.
- 일반주제명
- Particle physics
- 일반주제명
- Physics
- 일반주제명
- Applied mathematics
- 일반주제명
- Computational physics
- 키워드
- ATLAS detector
- 키워드
- Diboson
- 키워드
- Gaussian process
- 키워드
- Semileptonic
- 키워드
- Tracking
- 키워드
- Trigger
- 기타저자
- University of Pennsylvania Physics and Astronomy
- 기본자료저록
- Dissertations Abstracts International. 86-02B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
008250123s2024 us c eng d■001000017162156
■00520250211151939
■006m o d
■007cr#unu||||||||
■020 ▼a9798384024156
■035 ▼a(MiAaPQ)AAI31301921
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a593.7
■1001 ▼aXu, Riley.
■24512▼aA Measurement of Boosted Dibosons With Gaussian Process Background Modeling at the Atlas Detector
■260 ▼a[Sl]▼bUniversity of Pennsylvania▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a180 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-02, Section: B.
■500 ▼aAdvisor: Lipeles, Elliot.
■5021 ▼aThesis (Ph.D.)--University of Pennsylvania, 2024.
■520 ▼aThis dissertation presents a measurement of WW, W Z, and ZZ production in the semileptonic final state at the ATLAS detector. The measurement was performed using 139 fb−1 of √ s = 13 TeV proton-proton collisions collected at the Large Hadron Collider between 2015 and 2018. An innovative data-driven approach to model the V+jets background was investigated, using a Bayesian method called Gaussian process regression. The method, more commonly found in other disciplines and yet to see much adoption in high-energy physics, was established to be much more robust and precise than traditional approaches using functional fits. As the analysis is still blinded as of this publication, expected results are presented here instead. Differential fiducial cross sections are obtained in several variables, and a total sensitivity of around 10σ to the Standard Model process is expected. Expected limits on the Effective Field Theory coefficient cW are determined at approximately |cW /Λ 2 | 0.42 TeV−2 at the linear order and |cW /Λ 2 | 0.03 TeV−2 at the quadratic order. In addition to the diboson measurement, firmware, software, and algorithm developments on tracking in the trigger for the HL-LHC upgrade are presented. The highly increased pileup of the HL-LHC environment requires a much smarter trigger system to reject background events, and tracking enables more informed decisions. Two algorithms, a pattern matching method and a Hough transform approach, were implemented in a simulation framework and optimized for the HL-LHC environment.
■590 ▼aSchool code: 0175.
■650 4▼aParticle physics
■650 4▼aPhysics
■650 4▼aApplied mathematics
■650 4▼aComputational physics
■653 ▼aATLAS detector
■653 ▼aDiboson
■653 ▼aGaussian process
■653 ▼aSemileptonic
■653 ▼aTracking
■653 ▼aTrigger
■690 ▼a0798
■690 ▼a0605
■690 ▼a0216
■690 ▼a0364
■71020▼aUniversity of Pennsylvania▼bPhysics and Astronomy.
■7730 ▼tDissertations Abstracts International▼g86-02B.
■790 ▼a0175
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17162156▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
