  It is a common belief that the last missing piece of the Standard Model of
particles physics was found with the discovery of the Higgs boson at the Large
Hadron Collider. However, there remains a major prediction of quantum
tunnelling processes mediated by instanton solutions in the Yang-Mills theory,
that is still untested in the Standard Model. The direct experimental
observation of instanton-induced processes, which are a consequence of the
non-trivial vacuum structure of the Standard Model and of quantum tunnelling in
QFT, would be a major breakthrough in modern particle physics. In this paper,
we present for the first time a full calculation of QCD instanton-induced
processes in proton-proton collisions accounting for quantum corrections due to
both initial and final state gluon interactions, a first implementation in an
MC event generator as well as a basic strategy how to observe these effects
experimentally.
