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001008862 1001_ $$0P:(DE-Juel1)131179$$aHaidenbauer, Johann$$b0$$eCorresponding author$$ufzj
001008862 245__ $$a$\Lambda {\bar{\Lambda }}$ final-state interaction in the reactions $e^+e^- \rightarrow \phi {\Lambda }{\bar{{\Lambda }}}$ and $e^+e^- \rightarrow \eta {\Lambda }{\bar{{\Lambda }}}$
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001008862 520__ $$aNear-threshold ΛΛ¯ mass spectra for the reactions e+e−→ηΛΛ¯ and e+e−→ϕΛΛ¯ are investigated with an emphasis on the role played by the interaction in the ΛΛ¯ system. A variety of ΛΛ¯ potential models is employed that have been established in the analysis of data on pp¯→ΛΛ¯ in the past. It is shown that the near-threshold enhancement observed for the two e+e− reactions can be reproduced by considering the ΛΛ¯ final-state interaction in the partial waves suggested by the helicity-angle analysis of the experiments. For e+e−→ηΛΛ¯ the same ΛΛ¯ S-wave interaction as in e+e−→ΛΛ¯ is relevant and with it a consistent description of the pertinent measurements can be achieved. It is pointed out that a nonzero threshold cross section as observed for the latter reaction is not supported by the new ηΛΛ¯ data.
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001008862 7001_ $$0P:(DE-Juel1)131252$$aMeißner, Ulf-G.$$b1$$ufzj
001008862 773__ $$0PERI:(DE-600)1459066-9$$a10.1140/epja/s10050-023-01017-4$$gVol. 59, no. 6, p. 136$$n6$$p136$$tThe European physical journal / A$$v59$$x1434-6001$$y2023
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