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Femtoscopic study of coupled-channel NXi and ΛΛ interactions

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arxiv 2108.09644 v1 pith:FUCOULI7 submitted 2021-08-22 hep-ph nucl-th

Femtoscopic study of coupled-channel NXi and ΛΛ interactions

classification hep-ph nucl-th
keywords lambdacoupled-channelinteractionfemtoscopicpairssourcestrongtaken
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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.

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Cited by 1 Pith paper

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  1. Spin Femtoscopy: A Framework for Revealing Genuine Spin Correlations

    nucl-th 2026-07 unverdicted novelty 8.0

    Spin femtoscopy is proposed to separate genuine two-particle spin correlations from quantum statistics and final-state interaction effects via spin-sensitive correlation functions on Lambda pairs.