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Probing the Substructure of Large-Radius Jets in Lead-Lead Collisions at the LHC
Probing the Substructure of Large-Radius Jets in Lead-Lead Collisions at the LHC
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211151310
- ISBN
- 9798382772011
- DDC
- 530
- 저자명
- Zou, Wenkai.
- 서명/저자
- Probing the Substructure of Large-Radius Jets in Lead-Lead Collisions at the LHC
- 발행사항
- [Sl] : Columbia University, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 297 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 85-11, Section: B.
- 주기사항
- Advisor: Cole, Brian.
- 학위논문주기
- Thesis (Ph.D.)--Columbia University, 2024.
- 초록/해제
- 요약Measurements of the jet substructure in Pb+Pb collisions provide information about the mechanism of jet quenching in the hot and dense QCD medium created in these collisions, over a wide range of energy scales. Recent measurements of the nuclear modification factor of large-radius jets in √ \uD835\uDC60NN = 5.02 TeV Pb+Pb collisions with ATLAS are presented. 2017 pp data of 257 pb-1 inverse picobarns and 2018 Pb+Pb data of 1.72 nb-1 inverse nanobarns are used in these measurements. The R = 1.0 large-radius jets are reconstructed with the anti-kt algorithm from R = 0.2 anti-kt jets. In each large-radius jet, the associated R = 0.2 jets, as constituents, are re-clustered using the kt algorithm to obtain the earliest splitting substructure observables, including the splitting scale √\uD835\uDC5112 and the angular separation dR12. The nuclear modification factor RAA, which is the jet yield suppression in Pb+Pb compared to pp, is measured as a function of the jet transverse momentum pT and jet substructure observables √\uD835\uDC5112 and dR12. A significant RAA decrease for jets with one single sub-jet is observed, compared to jets with more complex substructure. These results support the hypothesis that jets with hard internal splittings losemore energy propagating through the medium. Measurements of RAA with dependence on the jet substructure characterized using charged particle fragments are also presented. Utilizing jets of a consistent definition, the substructure observables, specifically the splitting scale √\uD835\uDC5112 and the angular separation dR12, are extracted from the kt re-clusterings of charged particles associated to each large-radius jet. The soft-drop grooming algorithm is applied with the kt re-clusterings of the charged particles to mitigate the strong underlying event effects. RAA is found to have a significant decrease with increasing √\uD835\uDC5112 and dR12 at their lower values, suggesting possible color coherence effects influencing the jet energy loss in the medium.
- 일반주제명
- Physics
- 일반주제명
- Applied physics
- 일반주제명
- Particle physics
- 키워드
- Jet quenching
- 키워드
- Large-radius jet
- 키워드
- Jet energy loss
- 기타저자
- Columbia University Physics
- 기본자료저록
- Dissertations Abstracts International. 85-11B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
008250123s2024 us c eng d■001000017161103
■00520250211151310
■006m o d
■007cr#unu||||||||
■020 ▼a9798382772011
■035 ▼a(MiAaPQ)AAI31236873
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a530
■1001 ▼aZou, Wenkai.
■24510▼aProbing the Substructure of Large-Radius Jets in Lead-Lead Collisions at the LHC
■260 ▼a[Sl]▼bColumbia University▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a297 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 85-11, Section: B.
■500 ▼aAdvisor: Cole, Brian.
■5021 ▼aThesis (Ph.D.)--Columbia University, 2024.
■520 ▼aMeasurements of the jet substructure in Pb+Pb collisions provide information about the mechanism of jet quenching in the hot and dense QCD medium created in these collisions, over a wide range of energy scales. Recent measurements of the nuclear modification factor of large-radius jets in √ \uD835\uDC60NN = 5.02 TeV Pb+Pb collisions with ATLAS are presented. 2017 pp data of 257 pb-1 inverse picobarns and 2018 Pb+Pb data of 1.72 nb-1 inverse nanobarns are used in these measurements. The R = 1.0 large-radius jets are reconstructed with the anti-kt algorithm from R = 0.2 anti-kt jets. In each large-radius jet, the associated R = 0.2 jets, as constituents, are re-clustered using the kt algorithm to obtain the earliest splitting substructure observables, including the splitting scale √\uD835\uDC5112 and the angular separation dR12. The nuclear modification factor RAA, which is the jet yield suppression in Pb+Pb compared to pp, is measured as a function of the jet transverse momentum pT and jet substructure observables √\uD835\uDC5112 and dR12. A significant RAA decrease for jets with one single sub-jet is observed, compared to jets with more complex substructure. These results support the hypothesis that jets with hard internal splittings losemore energy propagating through the medium. Measurements of RAA with dependence on the jet substructure characterized using charged particle fragments are also presented. Utilizing jets of a consistent definition, the substructure observables, specifically the splitting scale √\uD835\uDC5112 and the angular separation dR12, are extracted from the kt re-clusterings of charged particles associated to each large-radius jet. The soft-drop grooming algorithm is applied with the kt re-clusterings of the charged particles to mitigate the strong underlying event effects. RAA is found to have a significant decrease with increasing √\uD835\uDC5112 and dR12 at their lower values, suggesting possible color coherence effects influencing the jet energy loss in the medium.
■590 ▼aSchool code: 0054.
■650 4▼aPhysics
■650 4▼aApplied physics
■650 4▼aParticle physics
■653 ▼aJet quenching
■653 ▼aLarge-radius jet
■653 ▼aJet energy loss
■653 ▼aLead-lead collisions
■690 ▼a0605
■690 ▼a0215
■690 ▼a0798
■71020▼aColumbia University▼bPhysics.
■7730 ▼tDissertations Abstracts International▼g85-11B.
■790 ▼a0054
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17161103▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
