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We outline the opportunities to study the production of the Standard Modelbosons, $W^\pm$, $Z^0$ and $H^0$ at "low" energies at fixed-target experimentsbased at possible future ultra-high-energy proton colliders, \ie\ theHigh-Energy LHC, the Super proton-proton Collider and the Future CircularCollider -- hadron-hadron. These can be indeed made in conjunction with theproposed future colliders designed to reach up to $\sqrt{s}=100$ TeV by usingbent crystals to extract part of the halo of the beam which would then impingeon a fixed target. Without disturbing the collider operation, this techniqueallows for the extraction of a substantial amount of particles in addition toserve for a beam-cleaning purpose. With this method, high-luminosityfixed-target studies at centre-of-mass energies above the $W^\pm$, $Z^0$ and$H^0$ masses, $\sqrt{s} \simeq 170-300$ GeV, are possible. We also discuss thepossibility offered by an internal gas target, which can also be used asluminosity monitor by studying the beam transverse shape.

Near-threshold production of $W^\pm$, $Z^0$ and $H^0$ at a fixed-target experiment at the future ultra-high-energy proton colliders