Determination of the strong coupling constant α.sub.s./sub. from transverse energy–energy correlations in multijet events at √s=8 TeV using the ATLAS detector

0501204 - FZÚ 2019 RIV DE eng J - Journal Article
Aaboud, M. - Aad, G. - Abbott, B. - Chudoba, Jiří - Hejbal, Jiří - Hladík, Ondřej - Jakoubek, Tomáš - Kepka, Oldřich - Kroll, Jiří - Kupčo, Alexander - Kůs, Vlastimil - Lokajíček, Miloš - Lysák, Roman - Marčišovský, Michal - Mikeštíková, Marcela - Němeček, Stanislav - Penc, Ondřej - Šícho, Petr - Staroba, Pavel - Svatoš, Michal - Taševský, Marek … Total 2874 authors
Determination of the strong coupling constant α_s from transverse energy–energy correlations in multijet events at √s=8 TeV using the ATLAS detector.
European Physical Journal C. Roč. 77, č. 12 (2017), s. 1-34, č. článku 872. ISSN 1434-6044. E-ISSN 1434-6052
R&D Projects: GA MŠMT LM2015058
Institutional support: RVO:68378271
Keywords : ATLAS * CERN LHC Coll * experimental results * 8000 GeV-cms * statistical analysis * data analysis method
OECD category: Particles and field physics
Impact factor: 5.172, year: 2017

Measurements of transverse energy–energy correlations and their associated asymmetries in multi-jet events using the ATLAS detector at the LHC are presented. The data used correspond to √s=8 TeV proton–proton collisions with an integrated luminosity of 20.2 fb−1 . The results are presented in bins of the scalar sum of the transverse momenta of the two leading jets, unfolded to the particle level and compared to the predictions from Monte Carlo simulations. A comparison with next-to-leading-order perturbative QCD is also performed, showing excellent agreement within the uncertainties. From this comparison, the value of the strong coupling constant is extracted for different energy regimes, thus testing the running of αs(μ) predicted in QCD up to scales over 1 TeV . A global fit to the transverse energy–energy correlation distributions yields αs(mZ)=0.1162±0.0011(exp.) +0.0084−0.0070(theo.)
Permanent Link: http://hdl.handle.net/11104/0293200