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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 → ...
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

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자료유형  
 학위논문 서양
최종처리일시  
20260202105216
ISBN  
9798291565476
DDC  
530
저자명  
Guhit, Jem Aizen.
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  
Higgs boson pair production
키워드  
Non-resonant production
키워드  
Large Hadron Collider
키워드  
ATLAS experiment
키워드  
Higgs self-coupling
키워드  
Chamber Service Module
기타저자  
University of Michigan Physics
기본자료저록  
Dissertations Abstracts International. 87-03B.
전자적 위치 및 접속  
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MARC

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■020    ▼a9798291565476
■035    ▼a(MiAaPQ)AAI32271752
■035    ▼a(MiAaPQ)umichrackham006304
■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.

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