Search for H-> γ*γ->μμγ with Full Run-2 Data at the LHC using the CMS Detector

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姓名

米亞當(John Adams S. Villamoran) 查詢紙本館藏

畢業系所

物理學系

論文名稱

(Search for H-> γ*γ->μμγ with Full Run-2 Data at the LHC using 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	★ 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

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至系統瀏覽論文 (2028-10-1以後開放)

摘要(中)

本篇論文研究了希格斯玻色子衰變為真實光子和虛光子的搜尋。研究也考慮了虛光子轉換成兩個μ介子的內部轉換。分析是根據大型強子對撞機上的 CMS 實驗在整個 Run-2 期間從質心能量為 13 TeV 的質子-質子對撞中收集到的數據進行的，對應於 137.1 fb^{-1} 的總亮度。與標準模型預測值相比，H-> γ*γ->μμγ 的分支比的預期上限被設定為1.09，標準模型希格斯玻色子的預期顯著性為 1.83σ。

摘要(英)

A search for a Higgs boson decaying to a real and a virtual photon is studied. The internal conversion of a virtual photon into two muons is considered. The analysis is performed on data collected by the CMS experiment at the LHC from proton-proton collisions with a center-of-mass energy of 13 TeV during the full Run-2 period, corresponding to an integrated luminosity of 137.1 fb^{-1}. An expected upper limit was set on the ratio of the branching fraction of H->γ*γ->μμγ with respect to the Standard Model prediction to be 1.09, with an expected significance of 1.83σ for the Standard Model Higgs boson.

關鍵字(中)

★ 大型強子對撞機
★ 稀有衰變
★ 希格斯玻色子
★ 緊湊渺子線圈

關鍵字(英)

★ Higgs boson
★ LHC
★ CMS
★ Rare decay
★ Dalitz decay

論文目次

1 Introduction 1
1.1 The Standard Model of Particle Physics . . . . . . . . . . . . . . . 1
1.1.1 Gauge Invariance . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1.2 Quantum Chromodynamics . . . . . . . . . . . . . . . . . . 4
1.1.3 Electroweak Theory and the Higgs Mechanism . . . . . . . 4
1.1.4 Summary of the Standard Model . . . . . . . . . . . . . . . 10
1.2 Higgs Dalitz Decays . . . . . . . . . . . . . . . . . . . . . . . . . . 12
1.2.1 Feature of the Decay . . . . . . . . . . . . . . . . . . . . . . 14
1.2.2 Background Compposition . . . . . . . . . . . . . . . . . . 14
1.2.3 Previous Results . . . . . . . . . . . . . . . . . . . . . . . . 15
2 Experimental Apparatus 19
2.1 The Large Hadron Collider . . . . . . . . . . . . . . . . . . . . . . 19
2.2 The Compact Muon Solenoid Detector . . . . . . . . . . . . . . . . 20
2.2.1 CMS Tracker System . . . . . . . . . . . . . . . . . . . . . . 23
2.2.2 Electromagnetic Calorimeter (ECAL) . . . . . . . . . . . . 23
2.2.3 Hadron Calorimteter (HCAL) . . . . . . . . . . . . . . . . . 24
2.2.4 Muon System . . . . . . . . . . . . . . . . . . . . . . . . . . 25
2.2.5 Trigger and Data Acquisition System . . . . . . . . . . . . 25
3 Physics Analysis 27
3.1 Data and Simulated Samples and Triggers . . . . . . . . . . . . . . 27
3.1.1 Data Samples . . . . . . . . . . . . . . . . . . . . . . . . . . 27
3.1.2 Simulated Samples . . . . . . . . . . . . . . . . . . . . . . . 28
3.1.3 Triggers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Muon17-Photon30 (MuPho) Trigger . . . . . . . . . . . . . 31
IsoMu27 (SingleMu) Trigger . . . . . . . . . . . . . . . . . . 35
3.2 Object Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
3.2.1 Muon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
3.2.2 Photon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
3.2.3 Jets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
3.3 Event Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
3.3.1 Event Categorization . . . . . . . . . . . . . . . . . . . . . . 46
Dimuon Mass Bin Optimization . . . . . . . . . . . . . . . 49
3.4 Signal and Background modeling . . . . . . . . . . . . . . . . . . . 53
3.4.1 Signal modeling . . . . . . . . . . . . . . . . . . . . . . . . . 53
3.4.2 Background modeling . . . . . . . . . . . . . . . . . . . . . 53
F-Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Envelope Method . . . . . . . . . . . . . . . . . . . . . . . . 55
3.5 Uncertainties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
3.5.1 Theoretical Uncertainties . . . . . . . . . . . . . . . . . . . 62
3.5.2 Normalization Uncertainties . . . . . . . . . . . . . . . . . 62
3.5.3 Shape Uncertainties . . . . . . . . . . . . . . . . . . . . . . 64
3.5.4 Correlation Between Different Years . . . . . . . . . . . . . 65
3.6 Statistical Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
4 Results and Conclusion 71
4.0.1 Conclusion . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
4.0.2 Outlook . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
A Signal Fits 83
Bibliography 123

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指導教授

郭家銘(Kuo, Chia-Ming)

審核日期

2024-1-31

推文