Distinction between sequential and direct three-body decays

Abstract

We discuss the three-body decay mechanisms of many-body resonances. Sequential decays proceed via two-body configurations after emission of the third particle. In direct decay all three particles leave simultaneously their interaction regions. The intermediate paths within the interaction regions are not observables and only accessible through models. The momentum distributions carry, apart from polarization, all possible information about decay modes and resonance structure. In this context we discuss detailed results for the decay of the ${}^9$Be($5/2^{-}$) resonance.

4 pages, 4 figures. Accepted for publication in Physical Review Letters

References in corpus (8)

• Proton-Antiproton Annihilation and Meson Spectroscopy with the Crystal Barrel
• The ${}^{10}$Li spectrum and the ${}^{11}$Li properties
• Three-body structure of the low-lying ${}^{17}$Ne-states
• Structure of low-lying 12C-resonances
• Complex scaling of the hyper-spheric coordinates and Faddeev equations
• Energy distributions from three-body decaying many-body resonances
• Selective population and neutron decay of the first excited state of semi-magic O-23
• Three-body resonant radiative capture reactions in astrophysics

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