博碩士論文 100222035 詳細資訊




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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
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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 Bibliography
[1] The CMS Collaboration. Observation of a new boson at a mass of 125 gev with the CMS
experiment at the LHC. Phys. Lett. B, 716:30, 2012.
[2] The ATLAS Collaboration. Observation of a new particle in the search for the Standard
Model Higgs boson with the ATLAS detector at the LHC. Phys.Lett. B, 716:1, 2012.
[3] The CMS Collaboration. Properties of the Higgs-like boson in the decay H to ZZ to 4l in
pp collisions at
p
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
nal state in a standard model Higgs boson search in pp collisions at the LHC. (CMS-
PAS-HIG-13-003), 2013.
[5] The ATLAS Collaboration. Measurements of the properties of the Higgs-like boson in the
four lepton decay channel with the ATLAS detector using 25 fb of proton-proton collision
data. (ATLAS-CONF-2013-013), 2013.
[6] The ATLAS Collaboration. Study of the spin of the Higgs-like boson in the two photon
decay channel using 20.7 fb-1 of pp collisions collected at
p
s = 8 tev with the ATLAS
detector. (ATLAS-CONF-2013-029), 2013.
[7] The ATLAS Collaboration. Study of the spin properties of the Higgs-like boson in the
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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