Measurements of (differential) ttbar production cross sections with the ATLAS experiment at the LHC

15 Apr 2021, 08:36
18m
Virtual (Stony Brook, NY)

Virtual

Stony Brook, NY

Online
Contributed Talk Structure Functions and Parton Densities Structure function and parton densities

Speaker

Margherita Spalla

Description

Comprehensive measurements of differential cross-sections of top-quark-antiquark pair-production are presented. The measurements are performed in the dilepon, lepton+jets and the all-hadronic channels which allow for reconstruction of the top-quark and top-quark-pair kinematic distributions. The two channels are complementary in terms of range and resolution for several variables, including final states with top quarks with very high transverse momenta compared to the top quark mass. Both measurements use data recorded during Run 2 of the LHC at the highest center of mass achieved for proton collisions. The measurements are compared quantitatively to several setups of next-to-leading order matrix-element generators combined with parton-shower generators. In addition, total cross-section measurements based on dilepton and lepton+jets final states using up to the full Run 2 dataset are presented.

Primary author

Presentation materials