Measurements of dijet azimuthal decorrelations and extraction of αS at ATLAS

Result code in 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>
Result on the web
<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>

Result language
angličtina
Original language name
Measurements of dijet azimuthal decorrelations and extraction of αS at ATLAS
Original language description
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.
Czech name
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Czech description
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Project
<a href="/en/project/LTT17018" target="_blank" >LTT17018: Getting new knowledge of the microworld using the CERN infrastructure</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
Proceeings of Science - XXVII International Workshop on Deep-Inelastic Scattering and Related Subjects
ISBN
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ISSN
1824-8039
e-ISSN
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Number of pages
6
Pages from-to
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Publisher name
SISSA/ISAS
Place of publication
Trieste
Event location
Torino
Event date
Apr 8, 2019
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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