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Search for Neutral Long-Lived Particles Decaying in the CMS Barrel Muon System- [electronic resource]
Search for Neutral Long-Lived Particles Decaying in the CMS Barrel Muon System - [electron...
Содержание
Search for Neutral Long-Lived Particles Decaying in the CMS Barrel Muon System- [electronic resource]
자료유형  
 학위논문파일 국외
최종처리일시  
20240214101911
ISBN  
9798380617802
DDC  
593.7
저자명  
Sheplock, James Thomas.
서명/저자  
Search for Neutral Long-Lived Particles Decaying in the CMS Barrel Muon System - [electronic resource]
발행사항  
[S.l.]: : University of California, Santa Barbara., 2023
발행사항  
Ann Arbor : : ProQuest Dissertations & Theses,, 2023
형태사항  
1 online resource(177 p.)
주기사항  
Source: Dissertations Abstracts International, Volume: 85-04, Section: B.
주기사항  
Advisor: Stuart, David.
학위논문주기  
Thesis (Ph.D.)--University of California, Santa Barbara, 2023.
사용제한주기  
This item must not be sold to any third party vendors.
초록/해제  
요약Long-lived particles are a class of particles that are predicted by many different theories of physics beyond the Standard Model. They are a promising avenue for discovering new physics because their signatures can be quite different from most Standard Model backgrounds.This dissertation presents a search for long-lived particles. The search utilizes the full Run 2 dataset totaling 138 fb−1 of proton-proton collisions recorded by the CMS experiment at √ s = 13 TeV. Hits in the barrel muon system drift tubes are clustered together and properties of the cluster are used to reject backgrounds. The results of the search are interpreted using a Twin Higgs model, showing sensitivity to Higgs-mediated long-lived particle production with proper lifetimes up to 100m and long-lived particles masses as low as 0.4 GeV. Limits are also set on a previously untested model where a dark quantum chromodynamic sector couples to the Higgs boson through various possible portals. Limits as low as 10−3 are set on the Higgs branching fraction to long-lived particles for both interpretations.
일반주제명  
Particle physics.
일반주제명  
Quantum physics.
일반주제명  
Atomic physics.
키워드  
CMS experiment
키워드  
High-energy physics
키워드  
Long-lived particles
키워드  
Barrel muon system
키워드  
Dark quantum chromodynamic
기타저자  
University of California, Santa Barbara Physics
기본자료저록  
Dissertations Abstracts International. 85-04B.
기본자료저록  
Dissertation Abstract International
전자적 위치 및 접속  
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