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姓名	陳冠昕(Kuan-Hsin Chen)  查詢紙本館藏	畢業系所	物理學系
論文名稱	(Measurement of Zγ production in 5 fb-1 of pp collisions at √s = 7 TeV with the CMS detector)
相關論文	★ 利用CMS探測器量測7TeV下的Zγ產生截面 ★ 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 ★ 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 ★ 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
檔案	[Endnote RIS 格式]    [Bibtex 格式]    [相關文章]   [文章引用]   [完整記錄]   [館藏目錄]   [檢視]  [下載] 本電子論文使用權限為同意立即開放。 已達開放權限電子全文僅授權使用者為學術研究之目的，進行個人非營利性質之檢索、閱讀、列印。 請遵守中華民國著作權法之相關規定，切勿任意重製、散佈、改作、轉貼、播送，以免觸法。
摘要(中)	本篇論文呈現了使用質子-質子對撞、中心能量在7 TeV的 Zγ 生產截面積的量測。其使用的數據為由LHC產生，由CMS偵測器所蒐集得到，其累積光度為5.0 fb-1。此產生截面積量測是針對光子橫向能量大於15 GeV、光子與電子空間分離ΔR(e,γ)大於0.7且電子對的恆定質量大於50 GeV。量測的碰撞產生截面為5.20 ± 0.32(系統誤差) ± 0.32(系統誤差) ± 0.11(光度誤差) pb。結果與標準模型的預測相吻合。
摘要(英)	Measurements of Zγ production cross section in proton-proton collisions at √s =7 TeV are presented. The results are based on data recorded by the CMS detector at the LHC that correspond to an integrated luminosity of 5.0 fb−1. The cross sections are measured for photon transverse energy > 15 GeV, and for separations between photons and final-state electrons in the pseudorapidity-azimuthal plane of ΔR(e, γ) > 0.7 in eeγ final state. A dielectron invariant mass requirement of di-electron pair > 50 GeV is imposed. The σ(pp → Zγ) × B(Z → e+ e−) is measured to be 5.20 ± 0.13(stat) ± 0.32(syst) ± 0.11(lum) pb. The results are consistent with predictions from the standard model.
關鍵字(中)	★ 光子 ★ Z玻色子 ★ 標準模型 ★ 高能物理	關鍵字(英)	★ CMS ★ LHC ★ Standard Model ★ Zγ
論文目次	1 Introduction 1 2 The Experimental Setup 3 2.1 The Large Hadron Collider . . . . . . . . . . . . . . . . . . . . . . . . 3 2.1.1 The Luminosity of LHC . . . . . . . . . . . . . . . . . . . . . 5 2.2 CMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.2.1 The coordinate of CMS detector . . . . . . . . . . . . . . . . . 6 2.2.2 Magnet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.2.3 Tracker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.2.4 Electromagnetic Calorimeter . . . . . . . . . . . . . . . . . . . 10 2.2.5 Hardronic Calorimeter . . . . . . . . . . . . . . . . . . . . . . 15 2.2.6 Muon Detectors . . . . . . . . . . . . . . . . . . . . . . . . . . 16 3 Overview of Zγ Production 18 3.1 Standard Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 3.2 Electroweak Theory . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 3.3 Zγ production and anomalous triple gauge coupling . . . . . . . . . . 22 3.3.1 Standard Model Zγ production . . . . . . . . . . . . . . . . . 22 3.3.2 Anomalous triple gauge coupling . . . . . . . . . . . . . . . . 23 4 Analysis Method 25 4.1 Data and Monte Carlo samples . . . . . . . . . . . . . . . . . . . . . 25 4.1.1 Data samples . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 4.1.2 Monte Carlo samples . . . . . . . . . . . . . . . . . . . . . . . 25 4.2 Object selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 4.2.1 Triggers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 4.2.2 Electron selection . . . . . . . . . . . . . . . . . . . . . . . . . 28 4.2.3 Tag and Probe Method . . . . . . . . . . . . . . . . . . . . . . 32 4.2.4 Photon selection . . . . . . . . . . . . . . . . . . . . . . . . . 44 4.3 Data-Driven Background Methods . . . . . . . . . . . . . . . . . . . . 50 4.3.1 The template method . . . . . . . . . . . . . . . . . . . . . . . 50 4.3.2 The ratio method . . . . . . . . . . . . . . . . . . . . . . . . . 57 5 Measurement of Zγ Production Cross-Section 60 5.1 Event selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60 5.2 Determination of backgrounds . . . . . . . . . . . . . . . . . . . . . . 70 5.3 Systematic uncertainties . . . . . . . . . . . . . . . . . . . . . . . . . 76 5.3.1 Systematic uncertainty on N sig . . . . . . . . . . . . . . . . . 76 5.3.2 Systematic uncertainty on F = A s ·  MC . . . . . . . . . . . . 76 5.3.3 Systematic uncertainty ρ eff . . . . . . . . . . . . . . . . . . . 77 5.3.4 Systematic uncertainty on the background estimation . . . . . 78 5.3.5 Systematic uncertainty on lluminosity . . . . . . . . . . . . . . 79 5.3.6 Summary of systematic uncertainties . . . . . . . . . . . . . . 79 5.4 Measurement of the Zγ cross section . . . . . . . . . . . . . . . . . . 82 5.4.1 Production cross section . . . . . . . . . . . . . . . . . . . . . 82 5.4.2 Results of Zγ cross section . . . . . . . . . . . . . . . . . . . . 83 6 Conclustion 86 A Anomalous triple gauge couplings in Zγ production 88 B Cut based photon identification for 2012 dataset 90 B.1 Event selection criteria . . . . . . . . . . . . . . . . . . . . . . . . . . 90 B.2 Tag and probe method . . . . . . . . . . . . . . . . . . . . . . . . . . 91
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指導教授	郭家銘(Chia-Ming Kuo)	審核日期	2014-10-9
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