Weak convergence of the extremes of branching Lvy processes with regularly varying tails

We study the weak convergence of the extremes of supercritical branching Levy processes $\{\mathbb{X}_t, t \ge0\}$ whose spatial motions are Levy processes with regularly varying tails. The result is drastically different from the case of branching Brownian motions. We prove that, when properly renormalized, $\mathbb{X}_t$ converges weakly. As a consequence, we obtain a limit theorem for the order statistics of $\mathbb{X}_t$.