Femtoscopic study of coupled-channel $N\Xi$ and $\Lambda \Lambda$ interactions

Abstract

The momentum correlation functions of S = -2 baryon pairs (p Xi^- and Lambda Lambda) produced in high-energy pp and pA collisions are investigated on the basis of the coupled-channel formalism. The strong interaction is described by the coupled-channel HAL QCD potential obtained by the lattice QCD simulations near physical quark masses, while the hadronic source function is taken to be a static Gaussian form. The coupled-channel effect, the threshold difference, the realistic strong interaction, and the Coulomb interaction are fully taken into account for the first time in the femtoscopic analysis of baryon-baryon correlations. The characteristic features of the experimental data for the p Xi^- and Lambda Lambda pairs at LHC are reproduced quantitatively with a suitable choice of non-femtoscopic parameters and the source size. The agreement between theory and experiment indicates that the N Xi (Lambda Lambda) interaction is moderately (weakly) attractive without having a quasi-bound (bound) state.

13 pages, 10 figures

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• Femtoscopic signatures of the lightest S-wave scalar open-charm mesons
• Strangeness $S=-2$ baryon-baryon interactions and femtoscopic correlation functions in covariant chiral effective field theory
• First measurement of the $\Lambda$-$\Xi$ interaction in proton-proton collisions at the LHC
• Exploring the ${\Sigma }^{+}p$ interaction by measurements of the correlation function
• Thermal luminosity degeneracy of magnetized neutron stars with and without hyperon cores
• Status of the hyperon-nucleon interaction in chiral effective field theory
• Lattice QCD and Baryon-Baryon Interactions
• The ${\eta }^{\prime }N$ interaction from the ${\eta }^{\prime }p$ correlation function
• Coalescence production of sexaquark with three diquarks in high-energy nuclear collisions
• Measurement of $p$-${\Xi }^{-}$ ($\bar{p}$-${\bar{\Xi }}^{+}$) Correlation Function in Isobar and Au+Au Collisions at $\sqrt{s_{\mathrm{NN}}}$ = 200 GeV with the STAR Detector
• Revealing dipion correlations for the observed substructure near the ${\pi }^{+}{\pi }^{-}$ mass threshold in $\psi (3686)\to J/\psi {\pi }^{+}{\pi }^{-}$
• Theoretical study of the $\Xi \alpha$ correlation function
• Correlation function for the $n{\bar{D}}_{s0}^{\ast }(2317)$ interaction and the issue of elastic unitarity