INVESTIGADORES
OTERO Y GARZON Gustavo Javier
artículos
Título:
Determination of the strong coupling constant 𝛼s α s from transverse energy?energy correlations in multijet events at 8 TeV using the ATLAS detector
Autor/es:
G. OTERO Y GARZON, ET. AL., THE ATLAS COLLABORATION
Revista:
EUROPEAN PHYSICAL JOURNAL C - PARTICLES AND FIELDS
Editorial:
SPRINGER
Referencias:
Lugar: Berlin; Año: 2017
ISSN:
1434-6044
Resumen:
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)αs(μ) predicted in QCD up to scales over 1 TeV1 TeV . A global fit to the transverse energy?energy correlation distributions yields 𝛼s(𝑚𝑍)=0.1162±0.0011(exp.) +0.0084−0.0070(theo.) αs(mZ)=0.1162±0.0011(exp.) −0.0070+0.0084(theo.) , while a global fit to the asymmetry distributions yields a value of 𝛼s(𝑚𝑍)=0.1196±0.0013(exp.) +0.0075−0.0045(theo.) αs(mZ)=0.1196±0.0013(exp.) −0.0045+0.0075(theo.) .
