High energy scattering of Dirac particles on smooth potentials
  The derivation of the Glauber type representation for the high energy scattering amplitude of particles of spin 1/2 is given within the framework of the Dirac equation in the Foldy Wouthuysen (FW) representation and two-component formalism. The differential cross sections on the Yukawa and Gaussian potentials are also considered and discussed. 
Nguyen Suan Han, Le Anh Dung, Nguyen Nhu Xuan and Vu Toan Thang
hep-th