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Searches for Di-Higgs Production and Measurement of the Higgs Self-Couplings in the HH → bbτ τ Decay Channel at the ATLAS Experiment and Radiation Studies for the Muon Chamber Service Module for ATLAS HL-LHC Upgrade
Searches for Di-Higgs Production and Measurement of the Higgs Self-Couplings in the HH → bbτ τ Decay Channel at the ATLAS Experiment and Radiation Studies for the Muon Chamber Service Module for ATLAS HL-LHC Upgrade
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202105216
- ISBN
- 9798291565476
- DDC
- 530
- 서명/저자
- Searches for Di-Higgs Production and Measurement of the Higgs Self-Couplings in the HH → bbτ τ Decay Channel at the ATLAS Experiment and Radiation Studies for the Muon Chamber Service Module for ATLAS HL-LHC Upgrade
- 발행사항
- [Sl] : University of Michigan, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 227 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-03, Section: B.
- 주기사항
- Advisor: Schwarz, Thomas Andrew.
- 학위논문주기
- Thesis (Ph.D.)--University of Michigan, 2025.
- 초록/해제
- 요약This thesis focuses on the search for non-resonant Higgs boson pair production in the HH → b ¯bτ +τ − channel, using 140 fb−1 of proton-proton collisions at a center-of-mass energy of √ s = 13 TeV, recorded by the ATLAS detector at the Large Hadron Collider (LHC). Understanding Higgs boson pair production is essential as it probes the fundamental structure of particle interactions and tests the predictions of the Standard Model (SM). The analysis investigates possible deviations from the SM by examining anomalous values of the Higgs boson (H) self-coupling modifier κλ and the quartic HHV V (V = W, Z) coupling modifier κ2V .No significant excess above the expected background from SM processes is observed. The observed (expected) upper limit at the 95% confidence level on the di-Higgs boson production rate is set at 5.9 (3.1) times the SM prediction. The coupling modifiers are constrained with an observed (expected) 95% confidence interval of −3.2 κλ 9.1 (−2.4 κλ 9.2) and −0.5 κ2V 2.7 (−0.2 κ2V 2.4), assuming all other Higgs boson couplings are fixed to SM values. These results provide crucial constraints on theoretical models beyond the Standard Model, guiding future experimental and theoretical research.Additionally, the thesis examines the performance of the Chamber Service Module (CSM) FPGA irradiation test, conducted using beam data collected at the Los Alamos Neutron Science Center (LANSCE) in 2021 and 2024, for the ATLAS Phase-2 Upgrade. The CSM is a key component of the precision tracking system in the ATLAS detector, managing data acquisition and transmission with mezzanine cards. The test results confirm the CSM's capability to handle increased data rates, bandwidth, and radiation tolerance, ensuring reliability for the upcoming High-Luminosity LHC (HL-LHC) operations.
- 일반주제명
- Physics
- 일반주제명
- Applied mathematics
- 일반주제명
- Theoretical physics
- 일반주제명
- Computational physics
- 키워드
- ATLAS experiment
- 기타저자
- University of Michigan Physics
- 기본자료저록
- Dissertations Abstracts International. 87-03B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■020 ▼a9798291565476
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■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a530
■1001 ▼aGuhit, Jem Aizen.
■24510▼aSearches for Di-Higgs Production and Measurement of the Higgs Self-Couplings in the HH → bbτ τ Decay Channel at the ATLAS Experiment and Radiation Studies for the Muon Chamber Service Module for ATLAS HL-LHC Upgrade
■260 ▼a[Sl]▼bUniversity of Michigan▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a227 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-03, Section: B.
■500 ▼aAdvisor: Schwarz, Thomas Andrew.
■5021 ▼aThesis (Ph.D.)--University of Michigan, 2025.
■520 ▼aThis thesis focuses on the search for non-resonant Higgs boson pair production in the HH → b ¯bτ +τ − channel, using 140 fb−1 of proton-proton collisions at a center-of-mass energy of √ s = 13 TeV, recorded by the ATLAS detector at the Large Hadron Collider (LHC). Understanding Higgs boson pair production is essential as it probes the fundamental structure of particle interactions and tests the predictions of the Standard Model (SM). The analysis investigates possible deviations from the SM by examining anomalous values of the Higgs boson (H) self-coupling modifier κλ and the quartic HHV V (V = W, Z) coupling modifier κ2V .No significant excess above the expected background from SM processes is observed. The observed (expected) upper limit at the 95% confidence level on the di-Higgs boson production rate is set at 5.9 (3.1) times the SM prediction. The coupling modifiers are constrained with an observed (expected) 95% confidence interval of −3.2 κλ 9.1 (−2.4 κλ 9.2) and −0.5 κ2V 2.7 (−0.2 κ2V 2.4), assuming all other Higgs boson couplings are fixed to SM values. These results provide crucial constraints on theoretical models beyond the Standard Model, guiding future experimental and theoretical research.Additionally, the thesis examines the performance of the Chamber Service Module (CSM) FPGA irradiation test, conducted using beam data collected at the Los Alamos Neutron Science Center (LANSCE) in 2021 and 2024, for the ATLAS Phase-2 Upgrade. The CSM is a key component of the precision tracking system in the ATLAS detector, managing data acquisition and transmission with mezzanine cards. The test results confirm the CSM's capability to handle increased data rates, bandwidth, and radiation tolerance, ensuring reliability for the upcoming High-Luminosity LHC (HL-LHC) operations.
■590 ▼aSchool code: 0127.
■650 4▼aPhysics
■650 4▼aApplied mathematics
■650 4▼aTheoretical physics
■650 4▼aComputational physics
■653 ▼aHiggs boson pair production
■653 ▼aNon-resonant production
■653 ▼aLarge Hadron Collider
■653 ▼aATLAS experiment
■653 ▼aHiggs self-coupling
■653 ▼aChamber Service Module
■690 ▼a0605
■690 ▼a0753
■690 ▼a0216
■690 ▼a0364
■71020▼aUniversity of Michigan▼bPhysics.
■7730 ▼tDissertations Abstracts International▼g87-03B.
■790 ▼a0127
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17359797▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


