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The structure of the three-boson bound state in Minkowski space is studiedfor a model with contact interaction. The Faddeev-Bethe-Salpeter equation issolved both in Minkowski and Euclidean spaces. The results are in fairagreement for comparable quantities, like the transverse amplitude obtainedwhen the longitudinal constituent momenta of the light-front valence wavefunction are integrated out. The Minkowski space solution is obtainednumerically by using a recently proposed method based on the direct integrationover the singularities of the propagators and interaction kernel of thefour-dimensional integral equation. The complex singular structure of theFaddeev components of the Bethe-Salpeter vertex function for space andtime-like momenta in an example of a Borromean system is investigated indetail. Furthermore, the transverse amplitude is studied as a mean to accessthe double-parton transverse momentum distribution. Following that, we showthat the two-body short-range correlation contained in the valence wavefunction is evidenced when the pair has a large relative momentum in aback-to-back configuration, where one of the Faddeev components of theBethe-Salpeter amplitude dominates over the others. In this situation apower-law behavior is derived and confirmed numerically.

Three-boson bound states in Minkowski space with contact interactions