Orateur
Dr
Giovanni Salme'
(Istituto Nazionale di Fisica Nucleare)
Description
Within a fully covariant constituent quark model, based on i) a
phenomenological Ansatz of the Bethe-Salpeter amplitude describing the
quark-pion vertex and ii) the Mandelstam description of the hadronic
tensor, we have investigated both generalized parton distributions and transverse
momentum distributions of the pion. The carefully comparison of our results
with
the available
i) Experimental data (spacelike elastic form factor and parton distribution) and
ii) Lattice data (generalized form factors for both no-spin flip and tensor
cases), has shown that a surprisingly good description can be achieved,
despite a relatively simple product form for the covariant Ansatz of the
pion. This gives us confidence to extend our fully covariant approach
by considering dynamical inputs through the so-called Nakanishi integral
representation of the quark-pion vertex.
Author
Dr
Giovanni Salme'
(Istituto Nazionale di Fisica Nucleare)
