Presented at Top2014, 7th International Workshop on Top Quark Physics, Cannes, France:
The Yukawa coupling of the Higgs boson to top quarks Yt is of particular interest as the top quark plays a special role in the electroweak symmetry breaking mechanism. Any deviation from its predicted value could hint at new physics. For this investigation the associated production of a Higgs boson and a single top quark (tHq) is a promising channel. Due to interference terms in the production amplitude the cross section sigma_tHq is not only sensitive to the magnitude of Yt but also to its sign making this channel special. In addition the branching ratio BR(Hgg) is sensitive to sign and magnitude of Yt. The ATLAS and CMS collaborations exploit both effects to set upper limits on sigma_tHq and the deviation of Yt by applying inherently different approaches. The most recent results from both collaborations using the full data provided by the LHC are presented.