Triangle singularity in the K−d → pΣ− reaction and its relevance to find the K̅N amplitude below threshold

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F22%3A00568505" target="_blank" >RIV/61389005:_____/22:00568505 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1051/epjconf/202227107006" target="_blank" >https://doi.org/10.1051/epjconf/202227107006</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1051/epjconf/202227107006" target="_blank" >10.1051/epjconf/202227107006</a>

Result language
angličtina
Original language name
Triangle singularity in the K−d → pΣ− reaction and its relevance to find the K̅N amplitude below threshold
Original language description
We study for the first time the pΣ− → K−d and its time reversal reaction close to threshold and show that they are driven by a triangle mechanism, with the Λ(1405), a proton and a neutron as intermediate states, which develops a triangle singularity close to the K̅d threshold. As the main result, we find that the cross section, well within measurable range, is very sensitive to different models that, while reproducing K̅N observables above threshold, provide different extrapolations of the K̅N amplitudes below threshold. The observables of this reaction will provide new constraints on the theoretical models, leading to more reliable extrapolations of the K̅N amplitudes below threshold and to more accurate predictions of the Λ(1405) state of lower mass.
Czech name
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Czech description
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Project
<a href="/en/project/GA19-19640S" target="_blank" >GA19-19640S: Study of Hadron Interactions, Production and Bound States</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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