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- W2394889769 abstract "We present the first ab initio calculations for $p$-shell hypernuclei including hyperon-nucleon-nucleon (YNN) contributions induced by a similarity renormalization group transformation of the initial hyperon-nucleon interaction. The transformation including the YNN terms conserves the spectrum of the Hamiltonian while drastically improving model-space convergence of the importance-truncated no-core model, allowing a precise extraction of binding and excitation energies. Results using a hyperon-nucleon interaction at leading order in chiral effective field theory for lower- to mid-$p$-shell hypernuclei show a good reproduction of experimental excitation energies while hyperon separation energies are typically overestimated. The induced YNN contributions are strongly repulsive and we show that they are related to a decoupling of the $mathrm{ensuremath{Sigma}}$ hyperons from the hypernuclear system, i.e., a suppression of the $mathrm{ensuremath{Lambda}}text{ensuremath{-}}mathrm{ensuremath{Sigma}}$ conversion terms in the Hamiltonian. This is linked to the so-called hyperon puzzle in neutron-star physics and provides a basic mechanism for the explanation of strong $mathrm{ensuremath{Lambda}}mathrm{NN}$ three-baryon forces." @default.
- W2394889769 created "2016-06-24" @default.
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- W2394889769 date "2016-10-28" @default.
- W2394889769 modified "2023-10-02" @default.
- W2394889769 title "Induced Hyperon-Nucleon-Nucleon Interactions and the Hyperon Puzzle" @default.
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- W2394889769 doi "https://doi.org/10.1103/physrevlett.117.182501" @default.
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