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- W2617110623 abstract "ηNNN and ηNNNN bound states are explored in stochastic variational method (SVM) calculations within a pionless effective field theory (EFT) approach at leading order. The theoretical input consists of regulated NN and NNN contact terms, and a regulated energy dependent ηN contact term derived from coupled-channel models of the N⁎(1535) nucleon resonance. A self consistency procedure is applied to deal with the energy dependence of the ηN subthreshold input, resulting in a weak dependence of the calculated η-nuclear binding energies on the EFT regulator. It is found, in terms of the ηN scattering length aηN, that the onset of binding η 3He requires a minimal value of ReaηN close to 1 fm, yielding then a few MeV η binding in η 4He. The onset of binding η 4He requires a lower value of ReaηN, but exceeding 0.7 fm." @default.
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- W2617110623 date "2017-08-01" @default.
- W2617110623 modified "2023-10-14" @default.
- W2617110623 title "Onset of η-nuclear binding in a pionless EFT approach" @default.
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- W2617110623 doi "https://doi.org/10.1016/j.physletb.2017.05.066" @default.
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