Asymptotic behavior ofA+B→ inert for particles with a drift

We consider the asymptotic behavior of the (one dimensional) two-species annihilation reaction A+B→0, where both species have a uniform drift in the same direction and like species have a hard core exclusion. Extensive numerical simulations show that starting with an initially random distribution of A’s and B’s at equal concentration the density decays like ${\mathit{t}}^{\mathrm{-}1/3}$ for long times. This process is thus in a different universality class from the cases without drift or with drift in different directions for the different species.