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

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