以CMS 偵測器在質心質量為8TeV使用雙渺子和三秒子頻道尋找雙電荷希格斯玻色子

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姓名

林喬穎(Chiao-ying, Lin) 查詢紙本館藏

畢業系所

物理學系

論文名稱

以CMS 偵測器在質心質量為8TeV使用雙渺子和三秒子頻道尋找雙電荷希格斯玻色子
(Search for the Doubly Charged Higgs Boson in dimuon and trimuon channels at sqrt{s}=8TeV with CMS Detector)

相關論文

★ 利用CMS探測器量測7TeV下的Zγ產生截面	★ 在質子對撞能量8TeV下尋找具有雙電子雙渺子末態的激發態輕子
★ Measurement of Zγ production in 5 fb-1 of pp collisions at √s = 7 TeV with the CMS detector	★ Search for a Higgs boson decaying into γ∗γ → eeγ in pp collisions at √s = 8 TeV with the CMS detector
★ Measurement of Z boson production in the electron decay channel in p+Pb collisions at √sNN = 5.02 TeV with the CMS detector	★ 火花偵測器的製成
★ Search for the production of two Higgs bosons in the final state with two photons and two b quarks in proton-proton collision at √s = 13 TeV	★ Search for Exotic Decay of A Higgs Boson into A Dark Photon and a Standard Model Photon in pp Collisions at √s = 13 TeV
★ Search for a Higgs boson decay into γ*γ→μμγ in pp collisions at √s = 13 TeV	★ Search for the rare decays of Z and Higgs bosons to J/ψ plus photon at √s = 13 TeV
★ Measurement of Zγ production cross section in pp collisions at sqrt(s) = 13 TeV with the CMS detector	★ Search for H→Zγ→bbγ produced in association with a Z boson in proton-proton collisions at √s = 13 TeV with the CMS detector at the LHC
★ nono	★ TCAD simulation of silicon detector
★ Assembly and Beam Test Analysis of sPHENIX INTT Detector	★ 研究 Dalitz Higgs 的 Muon 效率用於 Run II 和多變量電子用於 CMS 的 Run III

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摘要(中)

此分析的目標為在質心能量為8TeV 的質子對撞中尋找帶雙電荷的希格斯玻色子，
並且使用在LHC 之中的CMS 偵測器所記錄到總和亮度為19.62$fb^{-1}$的數據．
此分析是基於兩種不同的最終狀態：第一個只帶有兩個同電荷的渺子而第二個
則是帶有兩個同電荷的渺子外還伴隨了一個帶相反電荷的渺子

摘要(英)

The search for doubly charged Higgs boson production in proton-proton collision at $sqrt{s}=$8TeV will be presented. The preliminary result is based on data recorded by the CMS experiment at the LHC and correspond to integrated luminosity of 19.62 $fb^{-1}$. The search takes advantage of two final states: one with two same-signed muons through vector boson fusion and the other one with a pair of same-signed muons accompanied by an opposite-signed muon.

關鍵字(中)

★ 希格斯玻色子
★ 微中子
★ 渺子
★ 大強子對撞器
★ 緊湊渺子線圈

關鍵字(英)

★ Higgs boson
★ neutrino
★ muon
★ GM model
★ LHC
★ CMS

論文目次

1 Introduction and Motivation 1
1.1 Standard Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.2 Electroweak Symmetry Breaking . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.3 Neutrino Mass and Georgi-Machacek Model . . . . . . . . . . . . . . . . . . . . 10
2 CMS detector at LHC 13
2.1 Large Hardron Collider . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.2 Compact Muon Solenoid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.2.1 Magnet System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2.2.2 Tracker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
2.2.3 Electromagnetic Calorimeter . . . . . . . . . . . . . . . . . . . . . . . . . 19
2.2.4 Hadron Calorimeter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
2.2.5 Muon Chamber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
2.2.6 Trigger and Data Acqusition . . . . . . . . . . . . . . . . . . . . . . . . . 23
3 Searching Strategies 25
3.1 Dataset & Monte Carlo Samples . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
3.2 Physics Object Reconstruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
3.2.1 Primary vertex . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
3.2.2 Muon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
3.2.3 Jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
3.2.4 Particle Flow Algorithm . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
3.3 Optimization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
4 Background Estimation 42
4.1 Stanadard Model Background . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
4.2 Non-prompt background and tight-to-loose method . . . . . . . . . . . . . . . . 44
4.2.1 Methodology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
4.2.2 Result from Tight-to-Loose Method . . . . . . . . . . . . . . . . . . . . . 48
4.3 Systematic Uncertainties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
5 Result and Conclusion 57
Appendices 61
.1 Variables in Preselection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
.2 Aanlysis with Mwc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

參考文獻

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pp collisions at
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s =7 and 8 TeV. (CMS-PAS-HIG-13-002), 2013.
[4] The CMS Collaboration. Evidence for a particle decaying to W+W- in the fully leptonic
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detector. (ATLAS-CONF-2013-029), 2013.
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H ! WW? ! e channel with 21 fb

指導教授

郭家銘(Chia-ming Kuo)

審核日期

2013-10-25

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