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

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F24%3A10494820" target="_blank" >RIV/00216208:11320/24:10494820 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=1Tcm2mzbYX" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=1Tcm2mzbYX</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1140/epjc/s10052-024-13116-7" target="_blank" >10.1140/epjc/s10052-024-13116-7</a>

Result language
angličtina
Original language name
Measurement of multijet azimuthal correlations and determination of the strong coupling in proton-proton collisions at SQUARE ROOTs=13TeV
Original language description
A measurement is presented of a ratio observable that provides a measure of the azimuthal correlations among jets with large transverse momentum p(T). This observable is measured in multijet events over the range of p(T) = 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 134fb(-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 alpha S(mZ)=0.1177 +/- 0.0013(exp)(-0.0073)(+0.0116) (theo) = 0.1177(-0.0074)(+0.0117), where the total uncertainty is dominated by the scale dependence of the fixed-order predictions. A test of the running of alpha(S) in the TeV region shows no deviation from the expected NLO pQCD behaviour.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10300 - Physical sciences

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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