  In these proceedings, a measurement of the differential cross section of top
quark-antiquark pair ($\text{t}\bar{\text{t}}$) production in association with
one additional jet ($\text{t}\bar{\text{t}}$+jet) as a function of the inverse
of the invariant mass of the $\text{t}\bar{\text{t}}$+jet system,
$\rho=340\,\text{GeV}/m_{\text{t}\bar{\text{t}}+\text{jet}}$, is presented. The
normalized $\text{t}\bar{\text{t}}$+jet cross section is used to extract values
for the top quark pole mass $m_{\text{t}}^{\text{pole}}$ by a comparison to
theoretical predictions at next-to-leading order accuracy. The used data set
corresponds to an integrated luminosity of 36.3fb$^{-1}$ of proton--proton
collisions as collected by the CMS experiment at $\sqrt{s}=$ 13 TeV. Events
with two opposite-sign leptons are analyzed. Machine learning techniques are
employed to improve the kinematic reconstruction of the main observable and the
event classification. The unfolding to the parton level is performed using a
profiled likelihood fit. Given the ABMP16 parton distribution functions as a
reference set, a value of
$m_{\text{t}}^{\text{pole}}=172.94\pm1.37\,\text{GeV}$ is extracted using the
normalized $\text{t}\bar{\text{t}}$+jet cross section.
