Global solutions to quasilinear wave-Klein-Gordon systems in two space dimensions

In this paper we prove global existence and global behavior of solutions to quasilinear wave-Klein-Gordon systems in $ \mathbb{R}^{1+2} $ with quadratic nonlinearities satisfying the null condition. We consider small, regular, and compactly supported initial data, and prove global existence, pointwise decay estimates, and linear scattering for the solutions.