  Four on-lattice and six off-lattice models for active matter are studied
numerically, showing that in contact with a wall, they display universal
wetting transitions between three distinctive phases. The particles, which
interact via exclusion volume only, move persistently and, depending on the
model, change their direction either via tumble processes or rotational
diffusion. When increasing the turning rate $\nu_T$, the systems transit from
total wetting, to partial wetting and dewetted phases. In the first phase, a
wetting film covers the wall, with increasing heights while decreasing $\nu_T$.
The second phase is characterized by wetting droplets on the walls. And,
finally, the walls dries with few particles in contact with it. These phases
present two continuous non-equilibrium transitions. For the first transition,
from partial to total wetting, the fraction of dry sites vanishes continuously
when decreasing $\nu_T$, with a power law of exponent 1. And, for the second
transition, an order parameter proportional to the excess mass in droplets
decreases continuously with a power law of exponent 3 when approaching a
critical value of $\nu_T$. The critical exponents are the same for all the
models studied.

Statistical Mechanics;Soft Condensed Matter