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Coherent and incoherent atomic scattering: formalism and application to pionium interacting with matter
2000
Journal of Physics B: Atomic, Molecular and Optical Physics
The experimental determination of the lifetime of pionium provides a very important test on chiral perturbation theory. This quantity is determined in the DIRAC experiment at CERN. In the analysis of this experiment, the breakup probabilities of of pionium in matter are needed to high accuracy as a theoretical input. We study in detail the influence of the target electrons. They contribute through screening and incoherent effects. We use Dirac-Hartree- Fock-Slater wavefunctions in order to
doi:10.1088/0953-4075/33/18/308
fatcat:a5i4qp5buvbn3l4cvbuamjw6o4