Effect of deuteron breakup on the deuteron-Ξ correlation function

Background: The hadron-deuteron correlation function has attracted much interest as a potential method to access three-hadron interactions. However, the weakly bound nature of deuterons has not been considered in the preceding studies. Purpose: The breakup effect of deuterons in the deuteron-Xi(-) (d-Xi(-)) correlation function Cd Xi- is investigated. Methods: 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 nonperturbative reaction model, is adopted. Results: C(d Xi- )turns out to be sensitive to the strong interaction and enhanced by the deuteron breakup effect by 6%-8% for a d-Xi(-)relative momentum below about 70 MeV/c. Low-lying neutron-neutron continuum states are responsible for this enhancement. Conclusions: 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 Cd Xi- without the deuteron breakup effect can be justified.

Automated summary

The study investigates the breakup effect of deuterons in the deuteron-Xi(-) correlation function and finds that the deuterons' breakup effect has a noticeable but not very significant impact on Cd Xi-. Low-lying neutron-neutron continuum states are responsible for this effect.