利用ATLAS 偵測器探討希格斯玻色子衰變成一對W 玻色子之下的 Drell-Yan 背景分析

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研究生：	徐豪 Hsu, Hao
論文名稱：	利用ATLAS 偵測器探討希格斯玻色子衰變成一對W 玻色子之下的 Drell-Yan 背景分析 Drell-Yan Background estimation in the H → WW* → lvlv channel with the ATLAS detector
指導教授：	徐百嫻 Hsu, Pai-Hsien
口試委員:	張敬民 Cheung, Kingman 耿朝強 Geng, Chao-Qiang
學位類別：	碩士 Master
系所名稱：	理學院 - 物理學系 Department of Physics
論文出版年：	2018
畢業學年度：	106
語文別：	英文
論文頁數：	30
中文關鍵詞：	高能物理、基本粒子物理實驗
外文關鍵詞：	High Energy Physics, Particle Physics
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我們探討大強子對撞機裡的ATLAS 偵測器收集13TeV 能量強度的數據資料，
對於質子與質子之間的碰撞去做希格斯玻色子衰變成兩個W 玻色子對的分析。
針對Vector-Boson Fusion 的衰變型態做更深入的分析，其中一個背景分析就是
Z 玻色子衰變成一對輕子。研究部分主要就是在Z 玻色子衰變成一對輕子
的控制範圍之下做數據資料與Monti Carlo 產生器的結果分析。

We give an overview of the VBF analysis of the Higgs boson decaying into a pair of W bosons, with about 36fb^-1 of proton-proton collisions at center-of-mass energy of 13 TeV collected by the ATLAS detector at the LHC. One of the leading background processes is the Z boson decaying to a pair of leptons, and our study focuses on the results associated with data and Monte Carlo sample in the Z→ tautau control region of this analysis.

Contents                i

List of Tables          ii

List of Figures         iv

1 Introduction                                                    1

2 ATLAS Detector                                                  4

3 VBF H → WW*→ lvlv Analysis with data and Monte Carlo sample     6

3.1 Data and MC sample . . . . . . . . . . . . . . . . . . .  . . 8

4 Z → tautau Control Region in the VBF H → WW* → lvlv analysis    11

4.1 Drell-Yan in VBF H → WW channel: control regions definition.  11

5 Results of MC comparison at Z → tautau Validation region(VR)    13

6 Results of Reweighting process at Outside-Lepton-Veto(OLV) region
..... 18

7 Results of Z → tautau Systematics Uncertainties                 23

8 Conclusion and Future Work                                      28

Reference                                                         29

[1] LHC Higgs Cross Section Working Group, Handbook of LHC Higgs Cross Sections: 2. Differential Distributions CERN-2012-002
[2] ATLAS Collaboration, Observation and measurement of Higgs boson decays to WW* with the ATLAS detector Phys. Rev. D 92, 012006 (2015)
[3] ATLAS Collaboration, ATLAS simulation of boson plus jets processes in Run 2, 1427 ATL-PHYS-PUB-2017-006, 2017, url:http://cds.cern.ch/record/2261937.
[4] D. Rainwater and D. Zeppenfeld, Phys. Rev. D 60, 113004 (1999);
61, 099901(2000).
[5] ATLAS Collaboration, JINST 3, S08003 (2008)
[6] C. Nelson, Phys. Rev. D 37, 1220 (1988); M. Dittmarand H. Dreiner, Phys. Rev. D 55, 167 (1997).
[7] V. Barger, R. J. N. Phillips, and D. Zeppenfeld, Phys. Lett. B 346, 106 (1995).
[8] L. Breiman, J. Friedman, R. Olshen, and C. Stone, Classi cation and Regression Trees (Chapman and Hall, New York, 1984); Y. Freund and R. E. Schapire, J. Comput. Syst. Sci. 55, 119 (1997); J. Friedman, Computational Statistics and Data Analysis 38, 267 (2002).
[9] ATLAS Collaboration, Monte Carlo Generators for the Production of a WW or Z/gamma* Boson in Association with Jets at ATLAS in Run 2 ATL-PHYSPUB-2016-003
[10] T. Gleisberg et al., Event generation with SHERPA 1.1, Journal of High Energy Physics 2009.02 (2009) 007,
url: http://stacks.iop.org/1126-6708/2009/i=02/a=007.
[11] R. D. Ball et al., Parton distributions with LHC data, Nucl. Phys. B867(2013) 244/289,
arXiv: 1207.1303 [hep-ph].
[12] ATLAS Collaboration, ATLAS-CONF-2016-112

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