Measurements of properties of top quark-antiquark pair production in association
with a W boson in proton-proton collisions at a center-of-mass energy of 13TeV are presented,
using a data sample corresponding to an integrated luminosity of 138fb−1, recorded by the
CMS experiment at the CERN LHC. Events are selected based on the presence of either
two leptons with the same electric charge or three leptons, and multiple jets and b-tagged
jets. We present measurements of differential production cross sections as a function of
kinematic variables sensitive to different aspects of the process modeling, using a multivariate
discriminator in the two-lepton selection region and a simple selection-based method in the
three-lepton region. The normalized cross section measurements are generally consistent
with the standard model expectations, while we observe larger values compared to the
expectations in the absolute cross section measurements, consistent with previous inclusive
cross section measurements. In addition, we measure the leptonic charge asymmetry of this
process, obtaining an observed value of Alc = −0.19+0.16−0.18, consistent with the expectation
of −0.085 ± 0.006 predicted by next-to-leading order simulations
