ZZ Produktion und Suche nach bosonischen Higgs Zerfällen mit dem DELPHI Detektor bei LEP: = ZZ production and searches for bosonic Higgs decays with the DELPHI detector at LEP
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| Main Author: | |
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| Format: | Thesis Book |
| Language: | English |
| Published: |
2003
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| Subjects: | |
| Online Access: | Inhaltsverzeichnis |
| Item Description: | Zsfassung in dt. Sprache. - Text engl. - Karlsruhe, Univ., Diss., 2003 |
| Physical Description: | X, 148 S. Ill., graph. Darst. : 30 cm |
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| 245 | 1 | 0 | |a ZZ Produktion und Suche nach bosonischen Higgs Zerfällen mit dem DELPHI Detektor bei LEP |b = ZZ production and searches for bosonic Higgs decays with the DELPHI detector at LEP |c von Jens Rehn |
| 246 | 1 | |a ZZ Produktion und Suche nach bosonischen Higgs Zerfällen mit dem DELPHI Detektor bei LEP | |
| 246 | 1 | 1 | |a ZZ production and searches for bosonic Higgs decays with the DELPHI detector at LEP |
| 264 | 1 | |c 2003 | |
| 300 | |a X, 148 S. |b Ill., graph. Darst. : 30 cm | ||
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| 338 | |b nc |2 rdacarrier | ||
| 500 | |a Zsfassung in dt. Sprache. - Text engl. - Karlsruhe, Univ., Diss., 2003 | ||
| 502 | |a Karlsruhe, Univ., Diss., 2003 | ||
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CONTENTS
1 INTRODUCTION 1
2 THE STANDARD MODEL 5
2.1 THE GAUGE PRINCIPLE.YY-. G
2.2 THE STRONG INTERACTION. 8
2.3 THE WEAK INTERACTION. 9
2.4 THE RUNNING COUPLING CONSTANTS. 13
2.5 THE HIGGS MECHANISM IN THE STANDARD MODEL. 15
2.5.1 GIVING MASS TO
\\7 AND Z BOSONS. 17
2.5.2 GIVING MASS TO FERMIONS. 18
3 THE EXPERIMENT 21
3.1 THE LEP ACCELERATOR. 21
3.2 THE DELPHI DETECTOR. 25
3.2.1 THE TRACKING SYSTEM . 27
3.2.2 CALORIMETRIC DETECTORS. 30
3.2.3 PARTICLE IDENTIFICATION. 30
3.2.4 THE OFFLINE SYSTEM .
Y. 32
4 EVENT SIMULATION USING MONTE CARLO GENERATORS 35
4.1 SIMULATION OF TWO FERMION PROCESSES. 3G
4.1.1 E
+C" QQ (PHASE I) . 37
4.1.2 BUILDING OF FINAL PARTONS (PHASE* II). 38
4.1.3 HADRONISATION (PHASE III) . 44
4.1.4 DECAY OF UNSTABLE HADRONS (PHASE IV). 47
I
BIBLIOGRAFISCHE INFORMATIONEN
HTTP://D-NB.INFO/968039057
II
CONTENTS
4.2 SIMULATION OF FOUR FERMION PROCESSES . 48
4.2.1 C+C- -4 Z
(,Z. 49
4.2.2 C+C -4 11+14' . 49
4.2.3 C+R" -4 \V('V. 49
4.3 SIMULATION OF TWO PHOTON AND BHABHA PROCESSES. 49
4.4 DETECTOR SIMULATION. 51
5 ANALYSIS TOOLS AND TECHNIQUES 53
5.1 JET CLUSTERING. 53
5.1.1 LUCLUS. 54
5.1.2 JADE. 54
5.1.3 DURHAM. 55
5.2 DISCRIMINANT, ANALYSES TECHNIQUES . 55
5.2.1 FISHER DISCRIMINANT ANALYSIS. 59
5.2.2 NON LINEAR AND ITERATED DISCRIMINANT ANALYSES . 58
5.3 ARTIFICIAL NEURAL NETWORKS. 99
5.4 BINNED MAXIMUM LIKELIHOOD FIT. 92
5.5 KINEMATIC FITS WITH CONSTRAINTS. 95
6 SYSTEMATIC ERRORS: THE SHAKING TECHNIQUE 67
G.L THE REWEIGHTING TECHNIQUE. 98
6.1.1 DETERMINATION OF WEIGHT FACTORS. 98
6.1.2 APPLICATION OF THE WEIGHT FACTORS . 70
6.2 APPLICATIONS FOR THE SHAKING METHOD . 73
6.2.1 CROSS-CHECKS BY SHAKING 91 GEV MC SAMPLES . 73
6.2.2 CHECKS USING LEP II SAMPLES . 75
6.2.3 CONCLUSIONS. 81
6.3 SCALING AND BOOSTING TECHNIQUE . 81
6.3.1 ANALYSIS WITH INVISIBLE HIGGS DECAYS AT 207 GEV. 83
6.3.2 ANALYSIS WITH
Z -4 VV AND H -4 BB AT 207 GEV. 83
6.3.3 ZZ -4 QQUU AT 183 GEV'. 84
6.3.4
ZZ -4 QQUU AT 207 GEV. 84
CONTENTS
III
6.3.5 CONCLUSION. 84
6.4 INTERPRETATION AND OUTLOOK. 84
7 CROSS-SECTION MEASUREMENT OF DOUBLY RESONANT
ZL)
PAIRS 91
7.1 DATA AND SIMULATION SAMPLES. 92
7.2 TRACK SELECTION AND PRE SELECTION . 94
7.2.1 DATA QUALITY CUTS. 94
7.2.2 ANTI TWO PHOTON AND ANTI BLIABLM CUTS . 95
7.2.3 ANTI TWO FERMION AND ANTI ITU' CUTS. 96
7.3 SELECTION VARIABLES AND TAIL CUTS. 97
7.4 THE ITERATED DISCRIMINANT ANALYSIS. 99
7.5 SYSTEMATIC ERRORS AND WORKING POINT .101
7.6 THE RESULTING CROSS SECTIONS.103
8
SEARCH FOR BOSONIC HIGGS DECAYS 107
8.1 SIGNAL TOPOLOGIES.109
8.2 DATA AND SIMULATION SAMPLES.110
8.3 TRACK SELECTION AND PRE SELECTION .ILL
8.3.1 ANTI TWO FERMION AND ANTI FOUR FERMION NITS.ILL
8.4 CHANNEL WITH ON SHELL \V DECAYING LEPTONICALLY.112
8.4.1 SELECTION VARIABLES .113
8.4.2 ITERATED DISCRIMINANT ANALYSIS.113
8.5 CHANNEL WITH OFF SHELL W DECAYING LEPTONICALLY.117
8.5.1 SELECTION VARIABLES .117
8.5.2 ITERATED DISCRIMINANT, ANALYSIS.119
8.6 SYSTEMATIC ERRORS.120
8.6.1 LUMINOSITY .120
8.6.2 SIMULATION CROSS SECTIONS.120
8.6.3 DESCRIPTION OF GLUON RADIATION AT. PARTON LEVEL .120
8.6.4 ENERGY FLOW RECONSTRUCTION.121
8.7 RESULTS OVERVIEW .121
8.8 CONFIDENCE LIMITS ON BOSONIC HIGGS DECAYS.122
IV
CONTENTS
8.8.1 LIMITS ON THE HIGGS MASS.126
8.8.2 CROSS SECTION LIMITS.128
9 SUMMARY AND OUTLOOK 133
9.1 CROSS SECT ION MEASUREMENT OF DOUBLY RESONANT
Z PAIRS.133
9.2 SEARCH FOR BOSONIC HIGGS DECAYS.134
9.2.1 CHANNEL WITH ON SHELL W DECAYING LEPTONICALLY.134
9.2.2 CHANNEL WITH OFF SHELL W DECAYING LEPTONICALLY.134
BIBLIOGRAPHY 137
A PERFORMANCE PLOTS ZZ CROSS-SECTION ANALYSIS 141
ACKNOWLEDGEMENTS
147 |
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| language | English |
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| spelling | Rehn, Jens Verfasser aut ZZ Produktion und Suche nach bosonischen Higgs Zerfällen mit dem DELPHI Detektor bei LEP = ZZ production and searches for bosonic Higgs decays with the DELPHI detector at LEP von Jens Rehn ZZ Produktion und Suche nach bosonischen Higgs Zerfällen mit dem DELPHI Detektor bei LEP ZZ production and searches for bosonic Higgs decays with the DELPHI detector at LEP 2003 X, 148 S. Ill., graph. Darst. : 30 cm txt rdacontent n rdamedia nc rdacarrier Zsfassung in dt. Sprache. - Text engl. - Karlsruhe, Univ., Diss., 2003 Karlsruhe, Univ., Diss., 2003 Z-Boson (DE-588)4222264-3 gnd rswk-swf DELPHI Teilchendetektor (DE-588)4348474-8 gnd rswk-swf Higgs-Teilchen (DE-588)4209328-4 gnd rswk-swf Zerfall (DE-588)4067675-4 gnd rswk-swf (DE-588)4113937-9 Hochschulschrift gnd-content Higgs-Teilchen (DE-588)4209328-4 s Zerfall (DE-588)4067675-4 s Z-Boson (DE-588)4222264-3 s DELPHI Teilchendetektor (DE-588)4348474-8 s DE-604 DNB Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=010470610&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Rehn, Jens ZZ Produktion und Suche nach bosonischen Higgs Zerfällen mit dem DELPHI Detektor bei LEP = ZZ production and searches for bosonic Higgs decays with the DELPHI detector at LEP Z-Boson (DE-588)4222264-3 gnd DELPHI Teilchendetektor (DE-588)4348474-8 gnd Higgs-Teilchen (DE-588)4209328-4 gnd Zerfall (DE-588)4067675-4 gnd |
| subject_GND | (DE-588)4222264-3 (DE-588)4348474-8 (DE-588)4209328-4 (DE-588)4067675-4 (DE-588)4113937-9 |
| title | ZZ Produktion und Suche nach bosonischen Higgs Zerfällen mit dem DELPHI Detektor bei LEP = ZZ production and searches for bosonic Higgs decays with the DELPHI detector at LEP |
| title_alt | ZZ Produktion und Suche nach bosonischen Higgs Zerfällen mit dem DELPHI Detektor bei LEP ZZ production and searches for bosonic Higgs decays with the DELPHI detector at LEP |
| title_auth | ZZ Produktion und Suche nach bosonischen Higgs Zerfällen mit dem DELPHI Detektor bei LEP = ZZ production and searches for bosonic Higgs decays with the DELPHI detector at LEP |
| title_exact_search | ZZ Produktion und Suche nach bosonischen Higgs Zerfällen mit dem DELPHI Detektor bei LEP = ZZ production and searches for bosonic Higgs decays with the DELPHI detector at LEP |
| title_full | ZZ Produktion und Suche nach bosonischen Higgs Zerfällen mit dem DELPHI Detektor bei LEP = ZZ production and searches for bosonic Higgs decays with the DELPHI detector at LEP von Jens Rehn |
| title_fullStr | ZZ Produktion und Suche nach bosonischen Higgs Zerfällen mit dem DELPHI Detektor bei LEP = ZZ production and searches for bosonic Higgs decays with the DELPHI detector at LEP von Jens Rehn |
| title_full_unstemmed | ZZ Produktion und Suche nach bosonischen Higgs Zerfällen mit dem DELPHI Detektor bei LEP = ZZ production and searches for bosonic Higgs decays with the DELPHI detector at LEP von Jens Rehn |
| title_short | ZZ Produktion und Suche nach bosonischen Higgs Zerfällen mit dem DELPHI Detektor bei LEP |
| title_sort | zz produktion und suche nach bosonischen higgs zerfallen mit dem delphi detektor bei lep zz production and searches for bosonic higgs decays with the delphi detector at lep |
| title_sub | = ZZ production and searches for bosonic Higgs decays with the DELPHI detector at LEP |
| topic | Z-Boson (DE-588)4222264-3 gnd DELPHI Teilchendetektor (DE-588)4348474-8 gnd Higgs-Teilchen (DE-588)4209328-4 gnd Zerfall (DE-588)4067675-4 gnd |
| topic_facet | Z-Boson DELPHI Teilchendetektor Higgs-Teilchen Zerfall Hochschulschrift |
| url | http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=010470610&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
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