Measurement of multijet azimuthal correlations and determination of the strong coupling in proton-proton collisions at Vs = 13 TeV

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URI: https://hdl.handle.net/10902/33982
ISSN: 1434-6044
ISSN: 1434-6052
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Autoría
Hayrapetyan, A.; Bhowmik, Sandeep; Blanco Fernández, SergioAutoridad Unican; Brochero Cifuentes, Javier AndrésAutoridad Unican; Cabrillo Bartolomé, José IbánAutoridad Unican; Calderón Tazón, AliciaAutoridad Unican; Duarte Campderros, JorgeAutoridad Unican; Fernández García, MarcosAutoridad Unican; Gómez Gramuglio, GervasioAutoridad Unican; Lasaosa García, Clara; Martínez Rivero, Celso; Martínez Ruiz del Árbol, PabloAutoridad Unican; Matorras Weinig, FranciscoAutoridad Unican; Matorras Cuevas, PabloAutoridad Unican; Navarrete Ramos, Efrén; Piedra Gómez, JonatanAutoridad Unican; Scodellaro, LucaAutoridad Unican; Vila Álvarez, IvánAutoridad Unican; Vizán García, Jesús ManuelAutoridad Unican
Fecha
2024-08
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This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made.
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European Physical Journal C, 2024, 84(8), 842
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Springer New York LLC
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Resumen/Abstract
A measurement is presented of a ratio observable that provides a measure of the azimuthal correlations among jets with large transverse momentum pT. This observable is measured in multijet events over the range of pT = 360–3170 GeV based on data collected by the CMS experiment in proton-proton collisions at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 134 fb−¹. The results are compared with predictions from Monte Carlo parton-shower event generator simulations, as well as with fixed-order perturbative quantum chromodynamics (pQCD) predictions at next-to-leading-order (NLO) accuracy obtained with different parton distribution functions (PDFs) and corrected for nonperturbative and electroweak effects. Data and theory agree within uncertainties. From the comparison of the measured observable with the pQCD prediction obtained with the NNPDF3.1 NLO PDFs, the strong coupling at the Z boson mass scale is αS(mZ) = 0.1177±0.0013 (exp)+⁰.⁰¹¹⁶ −₀.₀₀₇₃ (theo) = 0.1177+⁰.⁰¹⁷⁷ −₀.₀₀₇₄, where the total uncertainty is dominated by the scale dependence of the fixed-order predictions. A test of the running of αS in the TeV region shows no deviation from the expected NLO pQCD behaviour.
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This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made.Excepto si se señala otra cosa, la licencia del ítem se describe como This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made.