A Complete Version of the Glauber Theory for Elementary Atom - Target   Atom Scattering and Its Approximations
  A general formalism of the Glauber theory for elementary atom (EA) - target atom (TA) scattering is developed. A second-order approximation of its complete version is considered in the framework of the optical-model perturbative approach. A `potential' approximation of a second-order optical model is formulated neglecting the excitation effects of the TA. Its accuracy is evaluated within the second-order approximation for the complete version of the Glauber EA-TA scattering theory. 
Olga Voskresenskaya and Alexander Tarasov
nucl-th hep-ph