| Description |
1 online resource (137 pages) |
| Series |
Springer Theses |
|
Springer theses.
|
| Contents |
Introduction -- The Hunt for the Higgs Boson -- The Large Hadron Collider and the CMS Experiment -- Jet Reconstruction and Calibration -- Event Selection -- Systematic Uncertainties -- Statistical Interpretation of Results -- Conclusions |
| Summary |
The theoretical foundations of the Standard Model of elementary particles relies on the existence of the Higgs boson, a particle which has been revealed for the first time by the experiments run at the Large Hadron Collider (LHC) in 2012. As the Higgs boson is an unstable particle, its search strategies were based on its decay products. In this thesis, Francesco Pandolfi conducted a search for the Higgs boson in the H --> ZZ --> ℓℓ⁻ qq̄ Decay Channel with 4.6 fb -1 of 7 TeV proton-proton collision data collected by the Compact Muon Solenoid (CMS) experiment. The presence of jets in the final state poses a series of challenges to the experimenter: both from a technical point of view, as jets are complex objects and necessitate of ad-hoc reconstruction techniques, and from an analytical one, as backgrounds with jets are copious at hadron colliders, therefore analyses must obtain high degrees of background rejection in order to achieve competitive sensitivity. This is accomplished by following two directives: the use of an angular likelihood discriminant, capable of discriminating events likely to originate from the decay of a scalar boson from non-resonant backgrounds, and by using jet parton flavor tagging, selecting jets compatible with quark hadronization and discarding jets more likely to be initiated by gluons. The events passing the selection requirements in 4.6 fb -1 of data collected by the CMS detector are examined, in the search of a possible signal compatible with the decay of a heavy Higgs boson. The thesis describes the statistical tools and the results of this analysis |
| Bibliography |
Includes bibliographical references |
| Notes |
Print version record |
| Subject |
Higgs bosons -- Decay
|
|
SCIENCE -- Physics -- Quantum Theory.
|
|
Physique.
|
|
Astronomie.
|
| Form |
Electronic book
|
| ISBN |
9783319009032 |
|
3319009036 |
|
