Speaker
Alejandro Kievsky
(INFN)
Description
Very detailed nucleon-nucleon (NN) and three-nucleon (3N) interactions have been constructed and applied to describe bound and scattering states in few-nucleon systems. They are based on chiral perturbation theory. At the same time the shallow character of the deuteron (S=1) state and the virtual 1S0 states allows for an effective description in which the pion degrees of freedom have been integrated out. This is known as pionless effective field theory. Different types of correlations appear; examples will be shown in the three- and four-nucleon systems and in the evolution of the nuclear levels from the unitary point, a point where the scattering lengths are infinity, to the physical point in which they take the observed value.
Author
Alejandro Kievsky
(INFN)
