Measurement of the energy flow at large pseudorapidities for s=0.9 TeV and s=7 TeV at the large hadron collider using the compact muon solenoid
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| Format: | Abschlussarbeit Buch |
| Sprache: | English |
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DESY
2011
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| 245 | 1 | 0 | |a Measurement of the energy flow at large pseudorapidities for s=0.9 TeV and s=7 TeV at the large hadron collider using the compact muon solenoid |c vorgelegt von Niladri Sen |
| 264 | 1 | |a Hamburg |b DESY |c 2011 | |
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Datensatz im Suchindex
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| adam_text | IMAGE 1
CONTENTS
LIST OF FIGURES VII
LIST OF TABLES XI
1 INTRODUCTION 1
2 THEORETICAL OVERVIEW 5
2.1 QUANTUM CHROMODYNAMICS 5
2.1.1 FUNDAMENTALS OF QUARKS AND GLUONS 5
2.1.2 KEY ASPECTS OF QCD 6
2.1.3 PERTURBATIVE QCD 8
2.2 PROTON-PROTON COLLISIONS 9
2.2.1 STRUCTURE OF THE PROTON 10
2.2.2 HARD-SCATTERING FORMALISM: FACTORISATION THEOREM 10
2.2.3 PARTONIC CROSS SECTION 11
2.2.4 PARTON DISTRIBUTION FUNCTIONS 11
2.2.5 PARTON EVOLUTION 12
2.2.6 UNDERLYING EVENT IN PROTON-PROTON COLLISIONS 14
2.3 PHYSICS IN EVENT GENERATORS 16
2.3.1 MINIMUM PR 16
2.3.2 PARTON SHOWERS 18
2.3.3 HADRONISATION AND FRAGMENTATION 18
2.3.4 MULTI-PARTON INTERACTIONS 19
2.3.4.1 PYTHIA 22
2.3.4.2 HERWIG 23
2.3.5 BRIEF DESCRIPTION OF MONTE CARLO MODELS AND THEIR TUNES . . .. 24
BIBLIOGRAFISCHE INFORMATIONEN HTTP://D-NB.INFO/1017569592
DIGITALISIERT DURCH
IMAGE 2
CONTENTS
2.3.5.1 PYTHIA6.4 25
2.3.5.2 ALTERNATIVE GENERATORS 26
2.3.5.3 COSMIC-RAY EVENT GENERATORS 27
2.4 RELEVANCE OF THE MEASUREMENT 28
2.4.1 PREDICTIONS FOR THE LHC 28
2.4.2 LOOKING FORWARD 30
2.4.3 ENERGY FLOW 31
2.4.3.1 PREVIOUS MEASUREMENTS 32
2.4.3.2 AT THE LHC 33
3 THE EXPERIMENT 37
3.1 ACCELERATOR 37
3.1.1 LARGE HADRON COLLIDER 37
3.2 COMPACT MUON SOLENOID DETECTOR 38
3.2.1 COORDINATE SYSTEM 38
3.2.2 DETECTOR OVERVIEW 39
3.2.3 SPECIFIC COMPONENTS 40
3.2.3.1 TRACKING SYSTEM 40
3.2.3.2 ELECTROMAGNETIC CALORIMETER 42
3.2.3.3 HADRONIC CALORIMETER 45
3.2.3.4 MUON SYSTEM 46
3.2.4 FORWARD CALORIMETERS 47
3.2.4.1 HADRONIC FORWARD CALORIMETER 47
3.2.4.2 CASTOR 51
3.2.5 TRIGGER AND DATA ACQUISITION 52
4 EVENT SIMULATION AND RECONSTRUCTION 55
4.1 EVENT SIMULATION 55
4.1.1 MONTE CARLO METHOD 55
4.1.2 EVENT GENERATION 56
4.1.3 DETECTOR SIMULATION WITH GEANT4 57
4.2 EVENT RECONSTRUCTION THROUGH PHYSICS OBJECT RECONSTRUCTION 58
4.2.1 PHYSICS OBJECT RECONSTRUCTION 58
4.2.2 RECHITS AND CALOTOWERS 58
IV
IMAGE 3
CONTENTS
4.2.3 PARTICLE FLOW RECONSTRUCTION 59
4.2.4 JET RECONSTRUCTION 61
4.2.4.1 JET ALGORITHMS 61
4.2.4.2 JET TYPES 63
4.2.4.3 JET ENERGY CORRECTION 63
5 EVENT SELECTION &: MEASUREMENT 65
5.1 EVENT SELECTION 65
5.1.1 DATA COLLECTION 65
5.1.2 ONLINE TRIGGER SELECTION 65
5.1.3 OFFLINE EVENT SELECTION 67
5.1.4 SIGNATURE OF EVENTS 67
5.1.5 DI-JET EVENT SELECTION CRITERIA 68
5.2 MEASUREMENT 71
5.2.1 TECHNICAL ISSUES 71
5.2.1.1 HF FIBRE RESPONSE 71
5.2.1.2 NON-UNIFORMITY EFFECTS 74
5.2.2 TREATMENT OF PILE-UP 75
5.2.3 ENERGY FLOW 77
5.2.3.1 ENERGY FLOW IN MINIMUM BIAS EVENTS 78
5.2.3.2 ENERGY FLOW IN DI-JET EVENTS 79
6 CORRECTION TO HADRON LEVEL 81
6.1 HADRON-LEVEL SELECTION 81
6.1.1 IMPACT OF HADRON-LEVEL SELECTION 83
6.1.1.1 IMPACT OF HADRON-LEVEL SELECTION ON CORRECTION FACTORS . 84
6.1.1.2 IMPACT OF HADRON-LEVEL SELECTION ON MODEL DEPENDENCE . 86
6.2 CORRECTION FACTORS 88
6.3 MIGRATIONS . 89
6.3.1 SINGLE PARTICLE RESPONSE 92
6.3.1.1 PIONS 93
6.3.1.2 ELECTRONS 94
6.3.1.3 PHOTONS 94
6.3.2 OVERALL EFFECT OF MIGRATIONS ON THE ENERGY FLOW 97
IMAGE 4
CONTENTS
7 SYSTEMATIC STUDIES 101
7.1 SYSTEMATIC CHECKS 101
7.1.1 CONSISTENCY BETWEEN PREVIOUS AND CURRENT MEASUREMENTS . . .. 101
7.1.2 SPLASH TRIGGERS 101
7.1.3 VERTEX SELECTION 103
7.1.4 HF NOISE CUT-OFF 103
7.1.5 DEAD MATERIAL EFFECTS 104
7.1.6 MODELLING OF DIFFRACTION 108
7.1.7 INDEPENDENCE VIA LEAST SQUARES METHOD 108
7.1.8 OTHER EFFECTS 110
7.2 SYSTEMATIC UNCERTAINTIES I LL
7.2.1 ENERGY SCALE UNCERTAINTY I LL
7.2.2 PRIMARY VERTEX Z-POSITION I LL
7.2.3 CHANNEL-BY-CHANNEL MISCALIBRATION 112
7.2.4 NOISE THRESHOLD 112
7.2.5 PHOTOMULTIPLIER HITS 112
7.2.6 NON-LINEARITY EFFECTS 112
7.2.7 NON-UNIFORMITY EFFECTS 113
7.2.8 FIBRE RESPONSE 113
7.2.9 MODEL DEPENDENCE 114
7.2.10 JET ENERGY SCALE UNCERTAINTY 115
7.2.11 TOTAL UNCERTAINTY 116
8 DISCUSSION OF RESULTS 119
9 CODA: IN THROUGH THE OUT DOOR 129
9.1 SUMMARY 129
9.2 OUTLOOK 132
REFERENCES 135
VI
|
| any_adam_object | 1 |
| author | Sen, Niladri |
| author_GND | (DE-588)1017667063 |
| author_facet | Sen, Niladri |
| author_role | aut |
| author_sort | Sen, Niladri |
| author_variant | n s ns |
| building | Verbundindex |
| bvnumber | BV039933686 |
| ctrlnum | (OCoLC)775831320 (DE-599)DNB1017569592 |
| dewey-full | 539.736 |
| dewey-hundreds | 500 - Natural sciences and mathematics |
| dewey-ones | 539 - Modern physics |
| dewey-raw | 539.736 |
| dewey-search | 539.736 |
| dewey-sort | 3539.736 |
| dewey-tens | 530 - Physics |
| discipline | Physik |
| format | Thesis Book |
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| indexdate | 2024-12-24T02:35:04Z |
| institution | BVB |
| language | English |
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| physical | XII, 140 S. graph. Darst. |
| publishDate | 2011 |
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| publisher | DESY |
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| spellingShingle | Sen, Niladri Measurement of the energy flow at large pseudorapidities for s=0.9 TeV and s=7 TeV at the large hadron collider using the compact muon solenoid |
| subject_GND | (DE-588)4113937-9 |
| title | Measurement of the energy flow at large pseudorapidities for s=0.9 TeV and s=7 TeV at the large hadron collider using the compact muon solenoid |
| title_auth | Measurement of the energy flow at large pseudorapidities for s=0.9 TeV and s=7 TeV at the large hadron collider using the compact muon solenoid |
| title_exact_search | Measurement of the energy flow at large pseudorapidities for s=0.9 TeV and s=7 TeV at the large hadron collider using the compact muon solenoid |
| title_full | Measurement of the energy flow at large pseudorapidities for s=0.9 TeV and s=7 TeV at the large hadron collider using the compact muon solenoid vorgelegt von Niladri Sen |
| title_fullStr | Measurement of the energy flow at large pseudorapidities for s=0.9 TeV and s=7 TeV at the large hadron collider using the compact muon solenoid vorgelegt von Niladri Sen |
| title_full_unstemmed | Measurement of the energy flow at large pseudorapidities for s=0.9 TeV and s=7 TeV at the large hadron collider using the compact muon solenoid vorgelegt von Niladri Sen |
| title_short | Measurement of the energy flow at large pseudorapidities for s=0.9 TeV and s=7 TeV at the large hadron collider using the compact muon solenoid |
| title_sort | measurement of the energy flow at large pseudorapidities for s 0 9 tev and s 7 tev at the large hadron collider using the compact muon solenoid |
| topic_facet | Hochschulschrift |
| url | http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=024791893&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
| work_keys_str_mv | AT senniladri measurementoftheenergyflowatlargepseudorapiditiesfors09tevands7tevatthelargehadroncolliderusingthecompactmuonsolenoid |