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HK: Fachverband Physik der Hadronen und Kerne

HK 18: Structure and Dynamics of Nuclei IV

HK 18.1: Group Report

Monday, March 28, 2022, 16:00–16:30, HK-H7

The search for the tetraneutron — •Meytal Duer1 and Thomas Aumann1,2 for the NeuLAND-SAMURAI collaboration — 1TU Darmstadt — 2GSI Helmholtzzentrum

Whether multi-neutron systems can exist as weakly bound states or very short-lived unbound resonant states has been a long-standing quest. The discovery of such a system would have far-reaching implications for many aspects of nuclear physics, from the nature of the force itself up to the way it builds nuclei, and also for the modeling of neutron stars.

The experimental search for isolated multi-neutron systems has been going for six decades, with a particular focus on the four-neutron system called tetraneutron, resulting in up to date only few indications for its existence, leaving it an elusive nuclear system.

In this talk I will present our most recent result from an experiment performed at the RIKEN Nishina Center located in Japan. The measurement was conducted at the SAMURAI setup, there using a new experimental approach based on a knockout reaction at large momentum transfer with radioactive high-energy 8He beam we were able to investigate the four-neutron system.

This work is supported by the DFG through grant no. SFB 1245, the GSI-TU Darmstadt cooperation and the BMBF project 05P15RDFN1.

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