title: Breakup of self-guided light beams into X wave trains.
abstract: Relaxation of the nonlinear spatiotemporal dynamics of cylindrically symmetric Schrödinger solitons due to their temporal modulation instability leads to soliton breakup into a train of X waves.
authors.affiliation: Departamento de Física Aplicada, Universidad Politécnica de Madrid, Rios Rosas 21, Spain. miguelangel.porras@upm.es
authors.forename: Miguel A
authors.initials: MA
authors.lastname: Porras
authors.forename: Alberto
authors.initials: A
authors.lastname: Parola