A precise determination of the strong-coupling constant from the recoil of bosons with the ATLAS experiment at √ = 8 TeV
The coupling constant of the strong force is determined from the transverse-momentum distribution of bosons produced in 8 TeV proton–proton collisions at the LHC and recorded by the ATLAS experiment. The -boson cross sections are measured in the full phase space of the decay leptons using 15.3 milli...
| Autores: | ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; |
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| Tipo de documento: | Artículo |
| Estado: | Published version |
| Fecha de publicación: | 2023 |
| País: | Chile |
| Institución: | Pontificia Universidad Católica de Chile |
| Repositorio: | Pontificia Universidad Católica de Chile |
| OAI Identifier: | oai:repositorio.uc.cl:11534/87412 |
| Acceso en línea: | https://repositorio.uc.cl/handle/11534/87412 http://inspirehep.net/record/2702147 https://arxiv.org/abs/2309.12986 https://doi.org/10.48550/arXiv.2309.12986 |
| Nivel de acceso: | Acceso abierto |
| Palabra clave: | High Energy Physics Experiment (hep-ex) Phenomenology (hep-ph) |
| Sumario: | The coupling constant of the strong force is determined from the transverse-momentum distribution of bosons produced in 8 TeV proton–proton collisions at the LHC and recorded by the ATLAS experiment. The -boson cross sections are measured in the full phase space of the decay leptons using 15.3 million electron and muon pairs, in a dataset collected in 2012 and corresponding to an integrated luminosity of 20.2 fb−1. The analysis is based on predictions evaluated at third order in perturbative QCD, supplemented by the resummation of logarithmically enhanced contributions in the low transverse-momentum region of the lepton pairs. The determined value of the strong coupling at the reference scale corresponding to the -boson mass is s() = 0.1183 ± 0.0009. This is the most precise experimental determination of s() achieved so far. |
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