Measurement of the differential cross section for $t$-channel single-top-quark production at $\sqrt{s}=13~\mathrm{TeV}$

A measurement of differential cross sections for $t$-channel single-top-quark production in proton-proton collisions at a centre-of-mass energy of 13 TeV is presented. The cross sections are measured as functions of the transverse momentum and the absolute value of the rapidity of the top quark. The analyzed data were recorded in the year 2015 by the CMS experiment and correspond to an integrated luminosity of $2.3~\mathrm{fb}^{-1}$. A maximum-likelihood fit to a multivariate discriminator is used to infer the signal and background fractions from the data. Unfolding to parton level is performed. The measured cross sections are compared with theoretical predictions to next-to-leading order matched with parton showering as implemented in Monte Carlo generators. General agreement is found within uncertainties.