Effect of deuteron breakup on the deuteron-$\Xi$ correlation function

Abstract

The hadron-deuteron correlation function has attracted many interests as a potential method to access the three-hadron interactions. However, the weakly-bound nature of deuteron has not been considered in the preceding studies. In this study, the breakup effect of deuteron on the deuteron-${\Xi }^{-}$ ($d$-${\Xi }^{-}$) correlation function $C_{d{\Xi }^{-}}$ is investigated. The $d$-${\Xi }^{-}$ scattering is described by a nucleon-nucleon-$\Xi$ three-body reaction model. The continuum-discretized coupled-channels method, which is a fully quantum-mechanical and non-perturbative reaction model, is adopted. $C_{d{\Xi }^{-}}$ turns out to be sensitive to the strong interaction and enhanced by the deuteron breakup effect by 6--8 % for the $d$-${\Xi }^{-}$ relative momentum below about 70 MeV/$c$. Low-lying neutron-neutron continuum states are responsible for this enhancement. Within the adopted model, the deuteron breakup effect on $C_{d{\Xi }^{-}}$ is found to be appreciable but not very significant. Except for the enhancement by several percent, studies on $C_{d{\Xi }^{-}}$ without the deuteron breakup effect can be justified.

arXiv comment13 pages, 12 figures

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