A precise determination of the strong-coupling constant from the recoil of 𝒁 bosons with the ATLAS experiment at √ 𝒔 = 8 TeV
link https://doi.org/10.48550/arXiv.2309.12986account_box Aad, G.account_box Abbott, B.account_box Abeling, K.account_box Abicht, N. J.account_box Abidi, S. H.account_box Aboulhorma, A.account_box Abramowicz, H.account_box Abusleme Hoffman, Angel Christianaccount_box Abreu, H.account_box Abulaiti, Y.account_box Acharya, B. S.account_box Bourdarios, C. Adamaccount_box Adamczyk, L.account_box Adamek, L.account_box Addepalli, S. V.account_box Addison, M. J.account_box Adelman, J.account_box Adiguzel, A.account_box Díaz Gutiérrez, Marco Aurelioaccount_box Garay Walls, Francisca Montserrat
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The coupling constant of the strong force is determined from the transverse-momentum distribution of 𝑍 bosons produced in 8 TeV proton–proton collisions at the LHC and recorded by the ATLAS experiment. The 𝑍-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 𝑍-boson mass is 𝛼s(𝑚𝑍) = 0.1183 ± 0.0009. This is the most precise experimental determination of 𝛼s(𝑚𝑍) achieved so far.
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| Autor | Aad, G. Abbott, B. Abeling, K. Abicht, N. J. Abidi, S. H. Aboulhorma, A. Abramowicz, H. Abusleme Hoffman, Angel Christian Abreu, H. Abulaiti, Y. Acharya, B. S. Bourdarios, C. Adam Adamczyk, L. Adamek, L. Addepalli, S. V. Addison, M. J. Adelman, J. Adiguzel, A. Díaz Gutiérrez, Marco Aurelio Garay Walls, Francisca Montserrat |
| Otro autor | ATLAS Collaboration European Organisation for Nuclear Research (CERN) |
| Título | A precise determination of the strong-coupling constant from the recoil of 𝒁 bosons with the ATLAS experiment at √ 𝒔 = 8 TeV |
| Fecha de publicación | 2023 |
| Resumen | The coupling constant of the strong force is determined from the transverse-momentum distribution of 𝑍 bosons produced in 8 TeV proton–proton collisions at the LHC and recorded by the ATLAS experiment. The 𝑍-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 𝑍-boson mass is 𝛼s(𝑚𝑍) = 0.1183 ± 0.0009. This is the most precise experimental determination of 𝛼s(𝑚𝑍) achieved so far. |
| Derechos | acceso abierto |
| DOI | 10.48550/arXiv.2309.12986 |
| Enlace | https://repositorio.uc.cl/handle/11534/87412 http://inspirehep.net/record/2702147 |
| Paginación | 43 páginas |
| Palabra clave | High Energy Physics Experiment (hep-ex) High Energy Physics Phenomenology (hep-ph) |
| Tipo de documento | artículo |