Speaker
Description
In this work, the pion is described by the Bethe–Salpeter wave function (BSWF), obtained by solving the corresponding bound-state equation formulated in Minkowski space. Established results from lattice QCD calculations for light quarks and gluons are employed to model the kernel of the Bethe–Salpeter equation (BSE) and to dress its constituents. In addition, we implemented a dressed quark–gluon vertex via an ansatz that incorporates a nontrivial infrared (IR) structure in the BSE, which is solved in Minkowski space using an integral representation. Within the adopted model, we explore the impact of the IR behaviour of the quark–gluon vertex on the internal structure of the pion by computing the valence wave function, which is obtained by projecting the BSWF onto the light front. The associated unpolarized parton distribution function and other related observables are calculated. These quantities are of current interest and will be further investigated in future electron–ion colliders.