Bonn 2020 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 17: Structure and Dynamics of Nuclei III

HK 17.6: Talk

Tuesday, March 31, 2020, 18:30–18:45, J-HS E

Structure of ⁶He in Halo EFT — •Matthias Göbel¹, Daniel R. Phillips², and Hans-Werner Hammer^1,3 — ¹IKP, TU Darmstadt — ²Department of Physics and Astronomy, Ohio University — ³EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH

The Borromean two-neutron halo ⁶He with its scale separations is well suited to a treatment in Halo EFT with the neutrons (n) and the α core as degrees of freedom. The s-wave nn interaction and the ²P_3/2 α n interaction as well as a three-body force are employed in our leading order analysis.

We study the structure of ⁶He by calculating the momentum-space probability density by using Faddeev amplitudes. Based on the probability density we compute the nn relative energy distribution observed in α knockout reactions. We discuss the sensitivity to the nn scattering length and compare to model calculations.

This work is supported in part by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) - Projektnummer 279384907 - SFB 1245 and by the US Department of Energy under contract no. DE-FG02-93ER-40756 (DRP).