Recent diboson and polarization measurements at ATLAS

Diboson production in hadron-collider experiments provides access into the self-couplings governing gauge vector bosons, as anticipated by the electroweak sector of the Standard Model of particle physics. Moreover, it offers valuable information concerning proton inner structures. Precise measurements of differential cross-sections serve as important tests for perturbative corrections based on the strong coupling constant ($\alpha_s$) in quantum chromodynamics and the weak coupling constant ($\alpha_W$) in electroweak unification, which underlie fixed-order theory predictions and Sudakov logarithm resummation schemes. The meticulous prediction of diboson processes plays also a crucial role, as they contribute to background estimations in other precision measurements of the Standard Model and in quests for phenomena beyond the Standard Model. This manuscript highlights three distinct measurements of diboson processes during proton-proton collisions, conducted with the dataset recorded with the ATLAS detector at the Large Hadron Collider between 2015 and 2018 at a center-of-mass energy of $\sqrt{s}=13$ TeV. The measurements encompass precision measurements of differential cross-sections for $W^+W^-$, $WZ$ and $Z\gamma+$jets, including a first observation of joint-polarization states in $WZ$ final states as well as polarization fractions of joint and individual states of massive gauge vector bosons.