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Hang Liu

Department of Physics & Astronomy, Ohio University
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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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