Measurements of jet observables sensitive to b -quark fragmentation in tt ¯ events at the LHC with the ATLAS detector
| Autor: | Aad, G., ATLAS Collaboration, Álvarez Estévez, Manuel, Barreiro Alonso, Fernando, Calvente López, Sergio, Camarero Muñoz, Daniel, Peso Malagón, José del, Glasman Kuguel, Claudia Beatriz, Terrón Cuadrado, Juan |
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| Přispěvatelé: | UAM. Departamento de Física Teórica |
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
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| Popis: | Artículo escrito por un elevado número de autores, solo se referencian el que aparece en primer lugar, el nombre del grupo de colaboración, si le hubiere, y los autores pertenecientes a la UAM Several observables sensitive to the fragmentation of b quarks into b hadrons are measured using 36 fb-1 of √s = 13 TeV proton-proton collision data collected with the ATLAS detector at the LHC. Jets containing b hadrons are obtained from a sample of dileptonic tt¯ events, and the associated set of charged-particle tracks is separated into those from the primary pp interaction vertex and those from the displaced b-decay secondary vertex. This division is used to construct observables that characterize the longitudinal and transverse momentum distributions of the b hadron within the jet. The measurements have been corrected for detector effects and provide a test of heavy-quark-fragmentation modeling at the LHC in a system where the top-quark decay products are color connected to the proton beam remnants. The unfolded distributions are compared with the predictions of several modern Monte Carlo parton-shower generators and generator tunes, and a wide range of agreement with the data is observed, with p values varying from 5 × 10-4 to 0.98. These measurements complement similar measurements from e+e- collider experiments in which the b quarks originate from a color singlet Z/γ∗ |
| Databáze: | OpenAIRE |
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