Quantum field theoretic model of metastable resonant spin-singlet state of the np pair
A.N.Ivanov, M.Cargnelli, M.Faber, H.Fuhrmann, V.A.Ivanova, J.Marton,, N.I.Troitskaya, J.Zmeskal
TL;DR
This paper models the metastable spin-singlet np pair as a quantum field theoretic Cooper pair, calculating its binding energy and scattering length, which align well with experimental data.
Contribution
It extends the Nambu-Jona-Lasinio model to describe the spin-singlet np pair as a Cooper pair, providing new theoretical insights.
Findings
Calculated binding energy of the np pair.
Predicted S-wave scattering length matches experimental data.
Extended NJL model successfully describes the spin-singlet state.
Abstract
The np pair in the spin-singlet state is treated as a Cooper np-pair within the extension of the Nambu-Jona-Lasinio model of light nuclei, describing the deuteron as a Cooper np-pair in the spin-triplet state. For the Cooper np-pair in the spin-singlet state we compute the binding energy and express the S-wave scattering length of np scattering in the spin-singlet state in terms of the binding energy. The theoretical value of the S-wave scattering length of np scattering agrees well with the experimental data.
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Taxonomy
TopicsQuantum Chromodynamics and Particle Interactions · Cold Atom Physics and Bose-Einstein Condensates · Nuclear physics research studies