コロキウムのお知らせ

I will present results for the pion structure based on the solution of the constituent quark-antiquark Bethe-Salpeter equation in Minkowski space obtained with the use of the Nakanishi Integral representation. The interaction kernel contains a dressed one-gluon exchange and an extended quark-gluon vertex. The model parameters are tuned to recent Lattice QCD calculations (LQCD). We will show results for the pion electromagnetic form factor, parton distribution function (PDF), unpolarized leading and sub-leading twist transverse momentum distribution (TMDs), and also the pion image on the light-front hypersurface. The dynamical gluon content is also computed for this model, and finally the Schwinger-Dyson equation for the quark self-energy is solved in Minkowski space with a massive gluon and results compared to LQCD calculations in the Landau gauge. This seminar is based on the following works:

• W. de Paula, E. Ydrefors, J.H. Alvarenga Nogueira, T. Frederico, G. Salmè. Observing the Minkowskian dynamics of the pion on the null-plane, Phys. Rev. D 103 (2021) 014002
• Emanuel Ydrefors, W. de Paula, J. H. Alvarenga Nogueira, T. Frederico, G. Salmé, Pion electromagnetic form factor with Minkowskian dynamics, Phys. Lett. B 820 (2021) 136494
• Dyana C. Duarte, T. Frederico, W. de Paula, E. Ydrefors, Dynamical mass generation in Minkowski space at QCD scale, Phys. Rev. D 105 (2022) 114055
• W. de Paula, E. Ydrefors, J.H. Nogueira Alvarenga, T. Frederico, G. Salmè, Parton distribution function in a pion with Minkowskian dynamics, Phys. Rev. D 105 (2022) L071505
• E. Ydrefors, W. de Paula, T. Frederico, G. Salmè, Unpolarized transverse-momentum dependent distribution functions of a quark in a pion with Minkowskian dynamics, e-Print: 2301.11599 [hep-ph]