Prediction for a four-neutron resonance

A. I. Mazur; A. M. Shirokov; G. Papadimitriou; I. A. Mazur; J. P. Vary; R. Roth

Prediction for a four-neutron resonance

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arxiv 1607.05631 v2 pith:C7MM6NOV submitted 2016-07-19 nucl-th nucl-ex

Prediction for a four-neutron resonance

A. M. Shirokov , G. Papadimitriou , A. I. Mazur , I. A. Mazur , R. Roth , J. P. Vary This is my paper

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We utilize various {\em ab initio} approaches to search for a low-lying resonance in the four-neutron ($4n$) system using the JISP16 realistic $NN$ interaction. Our most accurate prediction is obtained using a $J$-matrix extension of the No-Core Shell Model and suggests a $4n$ resonant state at an energy near $E_r = 0.8$ MeV with a width of approximately $\Gamma = 1.4$ MeV.

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Searching for the Tetraneutron Resonance on the Lattice
nucl-th 2026-01 unverdicted novelty 6.0

Lattice EFT calculations find no resonance signature in the tetraneutron ground-state energy, only a weak attraction in the dineutron-dineutron phase shift whose confined energy is close to the experimental low-energy peak.