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    Ξ-deuteron low-energy s-wave phase shifts and momentum correlation functions in Faddeev formulation

    M. Kohno1 and H. Kamada1,2

    Phys. Rev. C 114, 034004 – Published 8 September, 2026

    DOI: https://doi.org/10.1103/rxh5-w9xk

    Abstract

    The low-energy Ξ-deuteron scattering is investigated through the solution of Faddeev equations, employing three sets of the currently available representation of the Ξ-nucleon interactions. One of these is the chiral next-to-leading order interaction specified by the Jülich group, and the other two are based on the calculations by the HAL QCD method. The s-wave phase shifts in the J=3/2 and J=1/2 states are presented. Three-body wave functions in coordinate space are constructed from the Faddeev amplitudes in momentum space. These functions are used in the calculation of Ξd momentum correlation functions. The effects of the deuteron breakup are significant in the J=3/2 channel. The differences in the magnitude of the calculated correlation function show the quantitative difference of the ΞN interactions in the spin-isospin channels. The prospective experimental data on the Ξd momentum correlation function could contribute to a better description of the ΞN interactions.

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