Measurement of Higgs boson production via gluon fusion in the H WW decay channel with the CMS experiment
This thesis reports measurements of the Higgs boson production in proton-proton collisions at a centre-of-mass energy of 13 TeV with data collected by the CMS experiment during the Run 2 operation period (2016-2018) of the Large Hadron Collider at CERN. The measurement is performed using a sample of...
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| Tipo de recurso: | tesis doctoral |
| Fecha de publicación: | 2021 |
| País: | España |
| Institución: | Universidad Complutense de Madrid (UCM) |
| Repositorio: | Docta Complutense |
| Idioma: | inglés |
| OAI Identifier: | oai:docta.ucm.es:20.500.14352/11581 |
| Acceso en línea: | https://hdl.handle.net/20.500.14352/11581 |
| Access Level: | acceso abierto |
| Palabra clave: | 539.12(043.2) Higgs boson CMS experiment Large Hadron Collider CERN Bosón de Higgs Experimento CMS Gran Colisionador de Hadrones (LHC) Física nuclear Partículas 2207 Física Atómica y Nuclear 2208 Nucleónica |
| Sumario: | This thesis reports measurements of the Higgs boson production in proton-proton collisions at a centre-of-mass energy of 13 TeV with data collected by the CMS experiment during the Run 2 operation period (2016-2018) of the Large Hadron Collider at CERN. The measurement is performed using a sample of event candidates to originate from the decay of a Higgs boson into a pair of W bosons, which then decay into a charged lepton and a neutrino resulting in a final state with two charged leptons of different flavour. The thesis focuses on the study of the Higgs boson production through the gluon fusion process, which is the most favoured one at a centre-of-mass energy of 13 TeV. The optimisation of the physics object selection in the CMS configuration during the Run 2 is described first. Then, the evaluation of the main backgrounds are carefully scrutinised and the signal selection is decided. The main physics result is the Higgs boson production cross section, quantified in terms of a signal strength modifier, which is defined as the ratio of the observed cross section and the prediction from the Standard Model. The analysis is carried out in the inclusive phase space and in fine-grained exclusive phase space bins in the so-called Simplified Template Cross-Section (STXS) framework. The STXS framework has been developed with the aim to reduce the dependence on the underlying physics model and its theoretical uncertainties, while keeping a high sensitivity of the measurements... |
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