Argonne Physics Division Seminar - 26 Sep 2005

The Coulomb interaction between the two
protons is included in the calculation of proton-deuteron (pd) elastic
scattering and breakup, radiative pd capture and two-body and three-body
electromagnetic disintegration of ^{3}He. The hadron dynamics is
based on the purely nucleonic charge-dependent (CD) Bonn potential and
its realistic extension to a coupled-channel
two-baryon potential, CD Bonn + Delta, allowing for single virtual Delta-isobar
excitation that is responsible fora three-nucleon force and the
corresponding three-nucleon currents. Calculations are done using
integral equations in momentum space. The screening and renormalization
approach is employed for including the Coulomb interaction. Convergence
of the procedure is found already at screening radii 10 fm < R < 30 fm
depending on the beam energy. The reliability of the method
is demonstrated. The Coulomb effect on observables is seen at low
energies for the hole kinematic regime. In pd elastic scattering at
higher energies the Coulomb effect is confined to forward scattering
angles, while in pd breakup it always shows up in configurations close to
pp FSI. In electromagnetic reactions Coulomb competes with other effects
in a complicated way leading to an improved description of the
data.

ANL Physics Division Seminar Schedule