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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 陳凱風(Kai-Feng Chen) | |
dc.contributor.author | Chen-Yu Chuang | en |
dc.contributor.author | 莊振宇 | zh_TW |
dc.date.accessioned | 2021-06-17T07:01:33Z | - |
dc.date.available | 2021-01-20 | |
dc.date.copyright | 2021-01-20 | |
dc.date.issued | 2021 | |
dc.date.submitted | 2021-01-14 | |
dc.identifier.citation | K. Olive, “Review of Particle Physics”, Chinese Physics C 38 (aug, 2014) 090001 H.-Y. Zhou, “CP violation in top quark pair production at hadron colliders”, Phys. Rev. D58 (1998) 114002, doi: 10.1088/1674-1137/38/9/090001 S. K. Gupta and G. Valencia, “CP-odd correlations using jet momenta from tt events at the Tevatron”, Phys. Rev. D 81 (Feb, 2010) 034013, doi: 10.1103/PhysRevD.81.034013 O. Antipin and G. Valencia, “T-odd correlations from CP violating anomalous top-quark couplings revisited”, Phys. Rev. D 79 (Jan, 2009) 013013, doi: 10.1103/PhysRevD.93.014020 S. K. Gupta, A. S. Mete, and G. Valencia, “CP violating anomalous top-quark couplings at the LHC”, Phys. Rev. D 80 (Aug, 2009) 034013, doi: 10.1103/PhysRevD.80.034013 S. K. Gupta and G. Valencia, “CP-odd correlations using jet momenta from t¯t events at the Tevatron”, Phys. Rev. D 81 (2010) 034013, doi:10.1103/PhysRevD.81.034013 J. F. Donoghue and G. Valencia, “Searching for CP nonconservation in jet physics”, Phys. Rev. Lett. 58 (Feb, 1987) 451–454, doi: 10.1103/PhysRevLett.58.451 A. Hayreter and G. Valencia, “T-odd correlations from the top-quark chromoelectric dipole moment in lepton plus jets top-pair events”, Phys. Rev. D 93 (2016), no. 1, 014020, doi: 10.1103/PhysRevD.93.014020 CMS Collaboration, “Search for CP violation in tt production and decay in proton-proton collisions at √s = 8 TeV”, JHEP 03 (2017) 101, doi: 10.1007/JHEP03(2017)101 E. Halkiadakis, “Introduction to the LHC Experiments”, in Theoretical Advanced Study Institute in Elementary Particle Physics: Physics of the Large and the Small, pp. 489–518. 2011, doi: 10.1142/9789814327183_0009 CMS Collaboration, “The CMS Experiment at the CERN LHC”, JINST 3 (2008) S08004 D. Barney, “CMS Detector Slice”, (Jan, 2016). CMS Collection, doi: 10.1088/1748-0221/3/08/S08004 CMS Collaboration, “Description and performance of track and primary-vertex reconstruction with the CMS tracker”, JINST 9 (2014), no. 10, P10009, doi: 10.1088/1748-0221/9/10/P10009 A. Benaglia, “The CMS ECAL performance with examples”, Journal of Instrumentation 9 (01, 2014), doi: 10.1088/1748-0221/9/02/C02008 K. Cankoçak et al., “CMS HCAL installation and commissioning”, Journal of Physics: Conference Series 160 (apr, 2009) 012055, doi: 10.1088/1742-6596/160/1/012055 T. C. collaboration, “Performance of CMS muon reconstruction in pp collision events at√s = 7TeV”, Journal of Instrumentation 7 (oct, 2012) P10002–P10002, doi: 10.1088/1748-0221/7/10/P10002 CMS Collaboration, “Performance of the CMS muon detector and muon reconstruction with proton-proton collisions at √s = 13 TeV”, JINST 13 (2018), no. 06, P06015, doi: 10.1088/1748-0221/13/06/P06015 CMS Collaboration, “The Performance of the CMS Muon Detector in Proton-Proton Collisions at √s = 7 TeV at the LHC”, JINST 8 (2013) P11002, doi: 10.1088/1748-0221/8/11/P11002 P. Billoir, “Progressive track recognition with a Kalman-like fitting procedure”, Computer Physics Communications 57 (1989) 390–394. R. Fruhwirth, “Application of Kalman filtering to track and vertex fitting”, Nucl. Instrum. Meth. A 262 (1987) 444–450, doi: 10.1016/0168-9002(87)90887-4 K. Rose, “Deterministic annealing for clustering, compression, classification, regression, and related optimization problems”, Proceedings of the IEEE 86 (1998), no. 11, 2210–2239 R. Fruhwirth, W. Waltenberger, and P. Vanlaer, “Adaptive vertex fitting”, J. Phys. G 34 (2007) N343, doi: 10.1088/0954-3899/34/12/N01 “RECONSTRUCTING A MULTITUDE OF PARTICLE TRACKS WITHIN CMS, https://cms.cern/news/reconstructing-multitude-particle-tracks-within-cms”. “Muon Physical object group, https://twiki.cern.ch/twiki/bin/view/CMS/SWGuideMuonIdRun2”. “Performance of electron reconstruction and selection with the CMS detector in proton-proton collisions at √s = 8 TeV”, Journal of Instrumentation 10 (jun, 2015) P06005–P06005, doi: 10.1088/1748-0221/10/06/p06005 “EGamma Physical object group, https://twiki.cern.ch/twiki/bin/view/CMS/CutBasedElectronIdentificationRun2”. R. Atkin, “Review of jet reconstruction algorithms”, Journal of Physics: Conference Series 645 (oct, 2015) 012008, doi: 10.1088/1742-6596/645/1/012008 M. Cacciari, G. P. Salam, and G. Soyez, “The anti-ktjet clustering algorithm”, Journal of High Energy Physics 2008 (apr, 2008) 063–063, doi: 10.1088/1126-6708/2008/04/063 T. C. collaboration, “Determination of jet energy calibration and transverse momentum resolution in CMS”, Journal of Instrumentation 6 (nov, 2011) P11002–P11002, doi: 10.1088/1748-0221/6/11/p11002 “Jet Energy Resolution (CMS twiki page), https://twiki.cern.ch/twiki/bin/view/CMS/ JetResolution” “Jet Loose ID (CMS twiki page), https://twiki.cern.ch/twiki/bin/view/CMS/ JetID13TeVRun2016” CMS Collaboration, “Identification of heavy-flavour jets with the CMS detector in pp collisions at 13 TeV”, JINST 13 (2018), no. 05, P05011, doi: 10.1088/1748-0221/13/05/P05011 CMS Collaboration Collaboration, “Identification of b quark jets at the CMS Experiment in the LHC Run 2”, Technical Report CMS-PAS-BTV-15-001, CERN, Geneva, 2016 “btagging and Vertex Physics Object Group (CMS twiki page), https://twiki.cern.ch/twiki/bin/viewauth/CMS/BtagPOG” “btagging Recommendation (CMS twiki page), https://twiki.cern.ch/twiki/bin/view/CMS/BtagRecommendation” CMS Collaboration, “CMS. The TriDAS project. Technical design report, vol. 1: The trigger systems” L. Cadamuro, “The CMS Level-1 trigger system for LHC Run II”, Journal of Instrumentation 12 (mar, 2017) C03021–C03021, doi: 0.1088/1748-0221/12/03/c03021 D. Trocino, “The CMS High Level Trigger”, Journal of Physics: Conference Series 513 (jun, 2014) 012036, doi: 10.1088/1742-6596/513/1/012036 CMS Collaboration, “The CMS trigger system”, JINST 12 (2017), no. 01, P01020, M. Borisyak, F. Ratnikov, D. Derkach, and A. Ustyuzhanin, “Towards automation of data quality system for CERN CMS experiment”, Journal of Physics: Conference Series 898 (oct, 2017) 092041, doi: 10.1088/1748-0221/12/01/P01020 J. Alwall et al., “MadGraph 5 : Going Beyond”, JHEP 06 (2011) 128, doi: 10.1007/JHEP06(2011)128 S. Frixione, P. Nason, and G. Ridolfi, “The POWHEG-hvq manual version 1.0” T. Sjöstrand et al., “An introduction to PYTHIA 8.2”, Comput. Phys. Commun. 191 (2015) 159–177, doi: 10.1016/j.cpc.2015.01.024 GEANT4 Collaboration, “GEANT4–a simulation toolkit”, Nucl. Instrum. Meth. A 506 (2003) 250–303, doi: 10.1016/S0168-9002(03)01368-8 NNPDF Collaboration, “Parton distributions from high-precision collider data”, Eur. Phys. J. C 77 (2017), no. 10, 663, doi: 10.1140/epjc/s10052-017-5199-5 “Tag and Probe method (CMS twiki page), https://twiki.cern.ch/twiki/bin/view/CMSPublic/TagAndProbe” “btagging reweight method (CMS twiki page), https://twiki.cern.ch/twiki/bin/view/CMS/BTagSFMethods”. D. Atwood, S. Bar-Shalom, G. Eilam, and A. Soni, “CP violation in top physics”, Phys. Rept. 347 (2001) 1–222, doi: 10.1016/S0370-1573(00)00112-5 N. D. Christensen and C. Duhr, “FeynRules - Feynman rules made easy”, Comput. Phys. Commun. 180 (2009) 1614–1641, doi: 10.1016/j.cpc.2009.02.018 A. W. El Kaffas, W. Khater, O. M. Ogreid, and P. Osland, “Consistency of the two Higgs doublet model and CP violation in top production at the LHC”, Nucl. Phys. B 775 (2007) 45–77, doi: 10.1016/j.nuclphysb.2007.03.041 W. Khater and P. Osland, “CP violation in top quark production at the LHC and two Higgs doublet models”, Nucl. Phys. B 661 (2003) 209–234, doi: 10.1016/S0550-3213(03)00300-6 V. Keus, S. F. King, S. Moretti, and K. Yagyu, “CP Violating Two-Higgs-Doublet Model: Constraints and LHC Predictions”, JHEP 04 (2016) 048, doi: 10.1007/JHEP04(2016)048 S. Iguro and Y. Omura, “The direct CP violation in a general two Higgs doublet model”, JHEP 08 (2019) 098, doi: 10.1007/JHEP08(2019)098 W. Bernreuther and A. Brandenburg, “Tracing CP violation in the production of top quark pairs by multiple TeV proton proton collisions”, Phys. Rev. D 49 (1994) 4481–4492, doi: 10.1103/PhysRevD.49.4481 W. Bernreuther, A. Brandenburg, and M. Flesch, “Effects of Higgs sector CP violation in top quark pair production at the LHC” S. Ovyn, X. Rouby, and V. Lemaitre, “DELPHES, a framework for fast simulation of a generic collider experiment”“2HDM NLO UFO file, https://feynrules.irmp.ucl.ac.be/attachment/wiki/2HDM” C. R. Schmidt and M. E. Peskin, “Probe of CP violation in top quark pair production at hadron supercolliders”, Phys. Rev. Lett. 69 (Jul, 1992) 410–413, doi: 10.1103/PhysRevLett.69.410 S. Choi, C. Kim, and J. Lee, “T odd gluon - top quark effective couplings at the CERN large hadron collider”, Phys. Lett. B 415 (1997) 67–74, doi: 10.1016/S0370-2693(97)01238-0 | |
dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/72594 | - |
dc.description.abstract | 建立在質心能量八兆電子伏特的分析結果之上,本論文試圖於緊湊緲子螺線圈實驗中,質心能量十三兆電子伏特下,測量頂夸克對的共軛宇稱破壞。從2016年質子對撞累積光度35.9逆飛靶恩的數據中,我們可以藉由逆時間運算子擁有特徵值為-1的觀察量根據一個輕子及至少四個噴流的最終態來計算頂夸克對中的不對稱性。在這分析中,不確定性資訊,背景的干涉程度,以及偵測器的影響都已經被考慮並準備妥當。除此之外,其他可能的不對稱新物理來源以及逆時間運算子擁有特徵值為1的觀察量也同時在這篇論文中被討論。 | zh_TW |
dc.description.abstract | The research is to measure the CP violation in top quark pair at √s = 13TeV in CMS experiment. It is based on the √s = 8TeV energy scale result published in JHEP. According to the data collected from pp collider with integrated luminosity 35.9fb^{-1} in 2016 run, the asymmetry will be measured by T-odd triple product observables with specific final states which are exact one lepton and at least four jets. The uncertainty, background interference, and the dilution effect of the analysis have been well prepared. Besides, the T-even observables and new physics sources of top quark pair CPV are discussed. | en |
dc.description.provenance | Made available in DSpace on 2021-06-17T07:01:33Z (GMT). No. of bitstreams: 1 U0001-1201202114504400.pdf: 17267392 bytes, checksum: c66abd7d2dd4487494ea35f72eedf033 (MD5) Previous issue date: 2021 | en |
dc.description.tableofcontents | I Introduction 1 I.1 CP Violation in t¯t and possible sources . . . . . . . . . . . . . . . . . . . . . . . . 1 I.2 Triple product observables to detect CP violation in LHC . . . . . . . . . . . . . . 3 I.3 Experimental and data analysis strategy . . . . . . . . . . . . . . . . . . . . . . . 7 II Experimental Apparatus 9 II.1 Large Hadron Collider(LHC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 II.2 Compact Muon Solenoid(CMS) Detector . . . . . . . . . . . . . . . . . . . . . . 11 II.2.1 Tracking system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 II.2.2 Electromagnetic Calorimeter(ECAL) . . . . . . . . . . . . . . . . . . . . 14 II.2.3 Hadronic Calorimeter(HCAL) . . . . . . . . . . . . . . . . . . . . . . . . 15 II.2.4 Muon Chambers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 III Physical Objects Reconstruction and Selection 19 III.1 Track . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 III.2 Vertex . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 III.3 Pileup Issue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 III.4 Lepton . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 III.4.1 Muon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 III.4.2 Electron . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 III.5 Missing Transverse Energy(MET) . . . . . . . . . . . . . . . . . . . . . . . . . . 26 III.6 Jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 III.6.1 b-tagged jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 III.7 Trigger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 IV Data and Simulation samples 35 IV.1 Data sample . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 IV.2 Simulated sample . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 IV.3 Correction on simulation sample . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 IV.3.1 Pile-up Reweighing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 IV.3.2 Jet Energy correction, smearing and resolution . . . . . . . . . . . . . . . 40 IV.3.3 Lepton efficiency Scale Factor . . . . . . . . . . . . . . . . . . . . . . . . 40 IV.3.4 b-tagging Reweighing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 IV.3.5 Weigh to Luminosity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 V Events Selection and Reconstruction 44 V.1 Trigger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 V.2 Events Selection : Signal Region . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 V.3 Events Reconstruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 V.3.1 χ2 min Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 V.3.2 MVA Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 V.4 b¯b separation and distinguishment . . . . . . . . . . . . . . . . . . . . . . . . . . 61 V.5 Control Region . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78 VI Background Estimation 85 VI.1 Template Fit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87 VI.1.1 Fitting Result . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89 VI.1.2 Goodness of Fit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91 VI.2 Background subtraction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92 VII Asymmetry Bias 94 VII.1 Asymmetry in simulation sample . . . . . . . . . . . . . . . . . . . . . . . . . . . 94 VII.2 Detector and reconstruction bias : Events mixing method . . . . . . . . . . . . . . 97 VIIISystematic Uncertainty 101 VIII.1Introduction of systematic uncertainty . . . . . . . . . . . . . . . . . . . . . . . . 101 VIII.1.1Pileup re-weighting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101 VIII.1.2 Jet energy correction and resolution . . . . . . . . . . . . . . . . . . . . . 101 VIII.1.3 b-tagged scale factor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101 VIII.1.4 Lepton identification, isolation, reconstruction and trigger efficiencies . . 102 VIII.2Implementation and results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102 IX Dilution Effect 110 IX.1 Dilution factor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110 IX.2 Result . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112 X CP Asymmetry in Top quarks pair and corresponding observables/models 114 X.1 Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114 X.1.1 CEDM model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114 X.1.2 2HDM model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114 X.2 Observables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116 X.2.1 Classification and Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117 X.2.2 Observable property . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126 XI Results and Conclusion 129 XI.1 b and¯b identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129 XI.2 Statistical Uncertainty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130 XI.3 Systematic Uncertainty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132 XI.4 Conclusion and Outlook . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133 references 135 | |
dc.language.iso | en | |
dc.title | 於緊湊緲子螺線圈質心能量十三兆電子伏特透過輕子與噴流最終態尋找頂夸克對的共軛宇稱破壞 | zh_TW |
dc.title | Search for CP violation in Top quark pair with lepton+jets final state at √s=13TeV in CMS | en |
dc.type | Thesis | |
dc.date.schoolyear | 109-1 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 裴思達(Stathes Paganis),呂榮祥(Rong-Shyang Lu),郭家銘(Chia-Ming Kuo) | |
dc.subject.keyword | 頂夸克,共軛宇稱破壞,頂夸克對,緊湊緲子螺線圈, | zh_TW |
dc.subject.keyword | CMS,Top quark pair,CP violation,Top quark, | en |
dc.relation.page | 140 | |
dc.identifier.doi | 10.6342/NTU202100047 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2021-01-14 | |
dc.contributor.author-college | 理學院 | zh_TW |
dc.contributor.author-dept | 物理學研究所 | zh_TW |
顯示於系所單位: | 物理學系 |
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