  We study the resummation of soft gluon emission corrections to the production
of a top-antitop pair in association with a Z boson at the Large Hadron
Collider to next-to-next-to-leading logarithmic accuracy. By means of an
in-house parton level Monte Carlo code we evaluate the resummation formula for
the total cross section and several differential distributions at a
center-of-mass energy of 13 TeV, and we match these calculations to
next-to-leading order results.
