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arXiv · 1810.04883

In-medium properties of a $\Xi N$ interaction derived from chiral effective field theory

J. Haidenbauer·U. -G. Meißner
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Abstract

The in-medium properties of a baryon-baryon interaction for the strangeness $S=-2$ sector derived within chiral effective field theory up to next-to-leading order are investigated. The considered $\Xi N$ interaction is in line with available empirical constraints on the $\Lambda\Lambda$ $S$-wave scattering length and on $\Xi N$ elastic and inelastic cross sections. In particular, there are no near-threshold bound states in the $\Xi N$ system. A conventional $G$-matrix calculation for this interaction is performed and reveals that the single-particle potential of the $\Xi$-hyperon in nuclear matter is moderately attractive as suggested by recent experimental evidence for the existence of $\Xi$-hypernuclei.

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J. Haidenbauer, U. -G. Meißner. 2018-10-11. In-medium properties of a $\Xi N$ interaction derived from chiral effective field theory. https://doi.org/10.1140/epja/i2019-12689-2

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