@Article{ATLASCollaborationAaboud_etal2017, author="ATLAS Collaboration (Aaboud, M. et al and Alvarez Piqueras, D. and Barranco Navarro, L. and Cabrera Urban, S. and Castillo Gimenez, V. and Cerda Alberich, L. and Costa, M. J. and Fernandez Martinez, P. and Ferrer, A. and Fiorini, L. and Fuster, J. and Garcia, C. and Garcia Navarro, J. E. and Gonzalez de la Hoz, S. and Higon-Rodriguez, E. and Jimenez Pena, J. and King, M. and Lacasta, C. and Mamuzic, J. and Marti-Garcia, S. and Melini, D. and Mitsou, V. A. and Pedraza Lopez, S. and Rodriguez Rodriguez, D. and Romero Adam, E. and Ros, E. and Salt, J. and Sanchez Martinez, V. and Soldevila, U. and Sanchez, J. and Valero, A. and Valls Ferrer, J. A. and Vos, M.", title="Measurement of jet activity produced in top-quark events with an electron, a muon and two b-tagged jets in the final state in pp collisions root s=13TeV with the ATLAS detector", journal="European Physical Journal C", year="2017", publisher="Springer", volume="77", number="4", pages="220--38pp", abstract="Measurements of jet activity in top-quark pair events produced in proton-proton collisions are presented, using 3.2 fb of pp collision data at a centre-of-mass energy of 13 TeV collected by the ATLAS experiment at the Large Hadron Collider. Events are chosen by requiring an opposite-charge pair and two b-tagged jets in the final state. The normalised differential cross-sections of top-quark pair production are presented as functions of additional-jet multiplicity and transverse momentum, . The fraction of signal events that do not contain additional jet activity in a given rapidity region, the gap fraction, is measured as a function of the threshold for additional jets, and is also presented for different invariant mass regions of the system. All measurements are corrected for detector effects and presented as particle-level distributions compared to predictions with different theoretical approaches for QCD radiation. While the kinematics of the jets from top-quark decays are described well, the generators show differing levels of agreement with the measurements of observables that depend on the production of additional jets.", optnote="WOS:000399244600001", optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=3105), last updated on Thu, 18 May 2017 15:44:00 +0000", issn="1434-6044", doi="10.1140/epjc/s10052-017-4766-0", opturl="http://arxiv.org/abs/1610.09978", opturl="https://doi.org/10.1140/epjc/s10052-017-4766-0", archivePrefix="arXiv", eprint="1610.09978", language="English" }