  A search for the production of a single top quark in association with a Higgs
boson is performed using the decay $\text{H} \to \text{b} \bar{\text{b}}$. The
rate of this Higgs production mode is particularly sensitive to the relative
sign of the Higgs boson couplings to fermions and bosons. The 2015 pp
collisions data at a center-of-mass energy of 13 TeV are analyzed. This poster
focuses on the discrimination between signal and background events. Upper
limits, determined in the two-dimensional plane spanned by the coupling
modifiers of the Higgs boson to top quarks and to vector bosons, are presented.
