TY  - SER
AU  - Aaboud,M.
AU  - Abbott,B.
AU  - Chelkov,G.A.
AU  - Vaniachine,A.
AU  - Aad,G.
TI  - 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 at √s=13 TeV with the ATLAS detector
KW  - ATLAS, детектор
KW  - Большой адронный коллайдер
KW  - протон-протонные столкновения
KW  - верхние кварки
KW  - статьи в журналах
N1  - Библиогр.: 60 назв
N2  - Measurements of jet activity in top-quark pair events produced in proton–proton collisions are presented, using 3.2 fb−1 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 eμ 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, pT. 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 pT threshold for additional jets, and is also presented for different invariant mass regions of the eμbb¯ 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
UR  - http://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000616085
ER  -