This year in Moriond, the commonly used and often misleading name for the Winter Conferences in the French/Italian Alps, Guillelmo had his first cross section measurement of the WW process at 13.6 GeV, from Run 3 data shown.
The picture on the left shows the event display of a typical event where both W bosons decay leptonically with one high momentum muon reconstructed in the tracker and the muon chambers (in red) and one electron reconstructed in the tracker and the electromagnetic calorimeter (in green). Also indicated by way of measuring what is missing in the transverse momentum that should be conserved is the missing transverse momentum vector (in violet). The missing transverse momentum is due to the two neutrinos which are the result of the two W boson decays.
On the right hand side you can see the comparison of the cross section measurement with the various Monte Carlo program predictions. The most interesting way to expose the reliability of the prediction is to further subdivide the events into such reconstructed with zero, one or even two additional jets. In this way the higher order corrections, which lead to additional jets being produced, are teased out.
The bottom line: this is a beautiful measurement which shows that the standard model is like a rock in its predictions. It also starts to exhibit the effects of incomplete higher order corrections which need to be further improved if you want to have good Monte Carlo for higher precision measurements following at the High Luminosity LHC towards the end of the decade.