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SUMMARY:$pp\\to pK\\Lambda$ and $pp\\to n\\Lambda K^+π^+$ analyses at HAD
 ES at 4.5 GeV
DTSTART:20260714T130000Z
DTEND:20260714T134500Z
DTSTAMP:20260721T005000Z
UID:indico-event-18443@indico.global
DESCRIPTION:Speakers: Óscar Marcos Pérez Cytron (GSI/RUB)\n\nZoom link:
  \nhttps://cern.zoom.us/j/65752554157?pwd=y8GU4dSmhAZQLrzg4nlNXu196VofcN.
 1\nAbstract:\nThis talk presents the initial analysis of exclusive associa
 ted-strangeness production in proton–proton collisions at 4.5 GeV\, foc
 using on the $pp\\to pK\\Lambda$ and $pp\\to n\\Lambda K^+π^+$ channels r
 ecorded by the HADES experiment. We present the current status of the rec
 onstruction and event-selection strategy for these channels developed in p
 arallel.\n \nThe $pp\\to pK\\Lambda$ channel analysis targets the recoil 
 $\\Lambda$ polarization via partial wave analysis model constraints\, and
  differential cross sections sensitive to intermediate nucleon resonances 
 $N^*(1440)–N^*(1710)$. This channel also serves as a benchmark for our 
 ability to reconstruct secondary particles and resonances ahead of the upc
 oming pion-beam campaign.\n \nThe core physics of the $pp\\to n\\Lambda K
 ^+π^+$ channel targets the $K^+π^+$ subsystem\, which forms a pure I=3/2
  state free of conventional resonances\, isolating the non-resonant\, rep
 ulsive $Kπ$ interaction. Extracting the S-wave phase shift and scatterin
 g length would provide a benchmark for SU(3) chiral perturbation theory an
 d Lattice QCD\, superseding ~50-year-old direct scattering measurements. 
 Additionally\, the $\\Lambda n$ final-state interaction offers input for t
 he hyperon–nucleon potential\, relevant to the neutron star equation of
  state and the hyperon puzzle. \n\nhttps://indico.global/event/18443/
LOCATION:NB2/158 (RUB)
URL:https://indico.global/event/18443/
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