Speaker
Leonid Serkin
(INFN Gruppo Collegato di Udine and ICTP Trieste (IT))
Description
A search for the Standard Model four top quark production in proton-proton
collision data at √s=13TeV, collected with the ATLAS detector at the Large
Hadron Collider is presented. Data is analysed in the single lepton channel
which is characterised by an isolated electron or muon with high transverse
momentum, large missing transverse energy and multiple jets. The search
exploits the distinguishing up to 10 jets final state of the signal events
and the high total jet transverse momenta, both of which provide good
discrimination against the dominant background, namely the top-quark pair
production in association with jets. Events are categorised according to
their jet and b-tagged jet multiplicities in order to improve the
sensitivity to systematic uncertainties arising from the jet energy
calibration or the modelling of the tt¯+jets production. Upper bounds on
four top quark production with SM hypothesis and in several new physics
scenarios are set.
Primary author
Collaboration ATLAS
(ATLAS)
