Measurements of dijet azimuthal decorrelations and extraction of αS at ATLAS

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F19%3A00338807" target="_blank" >RIV/68407700:21340/19:00338807 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.22323/1.352.0121" target="_blank" >https://doi.org/10.22323/1.352.0121</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.22323/1.352.0121" target="_blank" >10.22323/1.352.0121</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Measurements of dijet azimuthal decorrelations and extraction of αS at ATLAS

Popis výsledku v původním jazyce

The production of jets at hadron colliders provides stringent tests of perturbative QCD.We present a measurement of the rapidity and transverse momentum dependence of dijet azimuthal decorrelations, using the quantity Rdphi. This quantity specifies the fraction of the inclusive dijet events in which the azimuthal opening angle of the two jets with the highest transverse momenta is less than a given value of the parameter dphimax. The variable Rdphi is measured in proton-proton collisions at sqrt(s) = 8 TeV as a function of the dijet rapidity interval, the event total scalar transverse momentum, and dphimax. Predictions of a perturbative QCD calculation at next-to-leading order in the strong coupling with corrections for non-perturbative effects describe the data well in the whole kinematic region. The data are used to determine the strong coupling aS and to study its running for momentum transfers from 260 GeV to above 1.6 TeV. An analysis that combines data at all momentum transfers results in aS(mZ)= 0:1127+0:0063 -0.0027.

Název v anglickém jazyce

Measurements of dijet azimuthal decorrelations and extraction of αS at ATLAS

Popis výsledku anglicky

The production of jets at hadron colliders provides stringent tests of perturbative QCD.We present a measurement of the rapidity and transverse momentum dependence of dijet azimuthal decorrelations, using the quantity Rdphi. This quantity specifies the fraction of the inclusive dijet events in which the azimuthal opening angle of the two jets with the highest transverse momenta is less than a given value of the parameter dphimax. The variable Rdphi is measured in proton-proton collisions at sqrt(s) = 8 TeV as a function of the dijet rapidity interval, the event total scalar transverse momentum, and dphimax. Predictions of a perturbative QCD calculation at next-to-leading order in the strong coupling with corrections for non-perturbative effects describe the data well in the whole kinematic region. The data are used to determine the strong coupling aS and to study its running for momentum transfers from 260 GeV to above 1.6 TeV. An analysis that combines data at all momentum transfers results in aS(mZ)= 0:1127+0:0063 -0.0027.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

10303 - Particles and field physics

Projekt

<a href="/cs/project/LTT17018" target="_blank" >LTT17018: Získávání nových poznatků o mikrosvětě v infrastruktuře CERN</a><br>

Návaznosti

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

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proceeings of Science - XXVII International Workshop on Deep-Inelastic Scattering and Related Subjects

ISBN

—

ISSN

1824-8039

e-ISSN

—

Počet stran výsledku

6

Strana od-do

—

Název nakladatele

SISSA/ISAS

Místo vydání

Trieste

Místo konání akce

Torino

Datum konání akce

8. 4. 2019

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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