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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10300 - Physical sciences

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

European Physical Journal C

ISSN

1434-6044

e-ISSN

1434-6052

Svazek periodika

84

Číslo periodika v rámci svazku

8

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

35

Strana od-do

842

Kód UT WoS článku

001412643200001

EID výsledku v databázi Scopus

2-s2.0-85201829376