Hang Liu

Department of Physics & Astronomy, Ohio University

Three-Dimensional Faddeev Computation of Nuclear Three-Body System

Traditionally employed computational methods for three body scattering at higher energies using partial wave decomposition has intrinsic limitations, since with the increasing energies the number of channel proliferates, leading to increasing difficulties with respect to accuracy as well as CPU time and memory requirements. This is especially the case when genuine three-body forces are included. Thus, a reliable numerical algorithm without partial wave is essential. The objective of the work to be presented is to carry out Faddeev calculation of the three-body bound state and scattering state in a three dimensional momentum space. The computational issues include the construction of efficient algorithms, the organization and distribution of the calculation across multi processors with load balance, the optimization of the calculation on each processor and the further scaling of one process by invoking multi threads. The three-body bound state with three-body forces and the the reaction mechanisms of Nucleon-Deuteron breakup process at higher energies associated with different kinematic configurations such as quasi-free(QSF), final state interaction (FSI) et al are investigated. Especially the multiple rescattering contribution beyond the leading order of two-body t-matrix as the function of energy and kinematic configurations is analyzed with order by order details.

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