Journal Article

FZJ-2021-03676

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png S-shell $\varLambda \varLambda$ hypernuclei based on chiral interactions

Le, H. (Corresponding author)FZJ* ; Haidenbauer, J.FZJ* ; Meißner, U.-G.FZJ* ; Nogga, A.FZJ*

2021
Springer Heidelberg

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Please use a persistent id in citations: http://hdl.handle.net/2128/28845  doi:10.1140/epja/s10050-021-00522-8

Abstract: We generalize the Jacobi no-core shell model (J-NCSM) to study double-strangeness hypernuclei. All particle conversions in the strangeness S=−1,−2 sectors are explicitly taken into account. In two-body space, such transitions may lead to the coupling between states of identical particles and of non-identical ones. Therefore, a careful consideration is required when determining the combinatorial factors that connect the many-body potential matrix elements and the free-space two-body potentials. Using second quantization, we systematically derive the combinatorial factors in question for S=0,−1,−2 sectors. As a first application, we use the J-NCSM to investigate ΛΛ s-shell hypernuclei based on hyperon-hyperon (YY) potentials derived within chiral effective field theory at leading order (LO) and up to next-to-leading order (NLO). We find that the LO potential overbinds 6ΛΛHe while the prediction of the NLO interaction is close to experiment. Both interactions also yield a bound state for 5ΛΛHe. The 4ΛΛH system is predicted to be unbound.

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Contributing Institute(s):

1. Theorie der Starken Wechselwirkung (IAS-4)
2. Theorie der starken Wechselwirkung (IKP-3)

Research Program(s):

1. 5111 - Domain-Specific Simulation Data Life Cycle Labs (SDLs) and Research Groups (POF4-511) (POF4-511)
2. DFG project 196253076 - TRR 110: Symmetrien und Strukturbildung in der Quantenchromodynamik (196253076) (196253076)

Appears in the scientific report 2021

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; DEAL Springer ; Ebsco Academic Search ; Essential Science Indicators ; IF < 5 ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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