Charged Higgs boson production around the top quark mass threshold

To estimate the cross section of charged Higgs boson production with a mass close to the top quark mass, several production modes and their interference have to be taken into account. In the following, the motivation to compute estimates for the cross section in this mass regime is discussed, and two different approaches are compared. A summary of the results of a recent, fully consistent approach correct at next-to-leading order, is given. Finally, practical implications of the available calculations for interpreting experimental results are discussed.