Cohomology rings and $p$-local behavior of even Artin groups

We generalize to certain families of even Artin groups several classical results on right-angled Artin groups.

In particular, we compute the cohomology ring, describe the pro-$p$ completion, and determine the $p$-Zassenhaus restricted Lie algebra in the FC case.

As a by-product, we prove a rigidity result that implies that if two even Artin groups of FC type are isomorphic, then for every prime $p$, the $p$-parts of their defining graphs are isomorphic.