ATLAS/CMS Top production at the LHC

The top quark pair production at the LHC has been studied in details by ATLAS and CMS collaborations. In addition to the inclusive tt cross section, now measured with an unprecedented precision, the LHC Run I data are exploited to provide comprehensive modeling comparisons through differential measurements at particle and/or parton levels. Furthermore, the uncertainties related to extrapolations to the full phase space are constrained using the measurements within a fiducial volume of the detector. The tt events are investigated in boosted regimes using the jet substructure techniques. The production cross section of tt in addition to one or two b quarks is also measured. Finally, the LHC experiments have presented the very first tt measurements at √ s = 13 TeV, performed using up to 80 pb−1 of the LHC Run II data. Presented at LHCP2015 The 3rd Conference on Large Hadron Collider Physics The Top Quark Production at the LHC Abideh Jafari for the ATLAS and CMS collaborations1,a) 1Universite Catholique de Louvain, Louvain-la-Neuve, Belgium a)Abideh.Jafari@cern.ch Abstract. The top quark pair production at the LHC has been studied in details by ATLAS and CMS collaborations. In addition to the inclusive tt cross section, now measured with an unprecedented precision, the LHC Run I data are exploited to provide comprehensive modeling comparisons through differential measurements at particle and/or parton levels. Furthermore, the uncertainties related to extrapolations to the full phase space are constrained using the measurements within a fiducial volume of the detector. The tt events are investigated in boosted regimes using the jet substructure techniques. The production cross section of tt in addition to one or two b quarks is also measured. Finally, the LHC experiments have presented the very first tt measurements at √ s = 13 TeV, performed using up to 80 pb−1 of the LHC Run II data. The top quark pair production at the LHC has been studied in details by ATLAS and CMS collaborations. In addition to the inclusive tt cross section, now measured with an unprecedented precision, the LHC Run I data are exploited to provide comprehensive modeling comparisons through differential measurements at particle and/or parton levels. Furthermore, the uncertainties related to extrapolations to the full phase space are constrained using the measurements within a fiducial volume of the detector. The tt events are investigated in boosted regimes using the jet substructure techniques. The production cross section of tt in addition to one or two b quarks is also measured. Finally, the LHC experiments have presented the very first tt measurements at √ s = 13 TeV, performed using up to 80 pb−1 of the LHC Run II data.