PoS - Proceedings of Science
Volume 314 - The European Physical Society Conference on High Energy Physics (EPS-HEP2017) - Top and Electroweak Physics (Parallel Session). Conveners: Jan Kretzschmar; Alexander Mitov; Luca Perrozzi. Scientific Secretary: Patrizia Azzi.
Measurements of $t t ̄$ +X using the ATLAS detector
K. Kawade*  on behalf of the ATLAS Collaboration
Full text: pdf
Pre-published on: January 08, 2018
Published on: March 20, 2018
Abstract
The large centre-of-mass energy available at the Large Hadron Collider (LHC) allows
for the copious production of top quark pairs in association with other final state
particles at high transverse momenta.
Several final state observables that are sensitive to additional radiation in top
anti-top quark final states has been measured by the ATLAS experiment.
The production of top quark pair in association with $W$ and $Z$ bosons or with a
photon have been also measured.
Analyses probing the top pair production with additional QCD radiation include the
multiplicity of jets for various transverse momentum thresholds in the 13 TeV data.
These measurements are compared to modern Monte Carlo generators based on NLO QCD
matrix element or LO multi-leg matrix elements,
and the results are consistent with the standard model predictions within the
uncertainties.
DOI: https://doi.org/10.22323/1.314.0445
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