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005     20240610121212.0
024 7 _ |a 10.1140/epja/s10050-023-01017-4
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024 7 _ |a 1434-6001
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024 7 _ |a 10.34734/FZJ-2023-02515
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100 1 _ |a Haidenbauer, Johann
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245 _ _ |a $\Lambda {\bar{\Lambda }}$ final-state interaction in the reactions $e^+e^- \rightarrow \phi {\Lambda }{\bar{{\Lambda }}}$ and $e^+e^- \rightarrow \eta {\Lambda }{\bar{{\Lambda }}}$
260 _ _ |a Heidelberg
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520 _ _ |a Near-threshold ΛΛ¯ mass spectra for the reactions e+e−→ηΛΛ¯ and e+e−→ϕΛΛ¯ are investigated with an emphasis on the role played by the interaction in the ΛΛ¯ system. A variety of ΛΛ¯ potential models is employed that have been established in the analysis of data on pp¯→ΛΛ¯ in the past. It is shown that the near-threshold enhancement observed for the two e+e− reactions can be reproduced by considering the ΛΛ¯ final-state interaction in the partial waves suggested by the helicity-angle analysis of the experiments. For e+e−→ηΛΛ¯ the same ΛΛ¯ S-wave interaction as in e+e−→ΛΛ¯ is relevant and with it a consistent description of the pertinent measurements can be achieved. It is pointed out that a nonzero threshold cross section as observed for the latter reaction is not supported by the new ηΛΛ¯ data.
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536 _ _ |a DFG project 196253076 - TRR 110: Symmetrien und Strukturbildung in der Quantenchromodynamik (196253076)
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700 1 _ |a Meißner, Ulf-G.
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773 _ _ |a 10.1140/epja/s10050-023-01017-4
|g Vol. 59, no. 6, p. 136
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