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Type: Journal article
Title: Binding of hypernuclei in the latest quark-meson coupling model
Author: Guichon, P.
Thomas, A.
Tsushima, K.
Citation: Nuclear Physics A, 2008; 814(1-4):66-73
Publisher: Elsevier Science BV
Issue Date: 2008
ISSN: 0375-9474
Statement of
Pierre A. M. Guichon, Anthony W. Thomas and Kazuo Tsushima
Abstract: The most recent development of the quark-meson coupling (QMC) model, in which the effect of the mean scalar field in-medium on the hyperfine interaction is also included self-consistently, is used to compute the properties of finite hypernuclei. The calculations for $\Lambda$ and $\Xi$ hypernuclei are of comparable quality to earlier QMC results without the additional parameter needed there. Even more significantly, the additional repulsion associated with the increased hyperfine interaction in-medium completely changes the predictions for $\Sigma$ hypernuclei. Whereas in the earlier work they were bound by an amount similar to $\Lambda$ hypernuclei, here they are unbound, in qualitative agreement with the experimental absence of such states. The equivalent non-relativistic potential felt by the $\Sigma$ is repulsive inside the nuclear interior and weakly attractive in the nuclear surface, as suggested by the analysis of $\Sigma$-atoms.
Description: Submitted to Cornell University’s online archive in 2007 by Guichon. Post-print sourced from
RMID: 0020096079
DOI: 10.1016/j.nuclphysa.2008.10.001
Published version:
Appears in Collections:Chemistry and Physics publications

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