Applicability of the continuum-discretized coupled-channels method to the deuteron breakup at low energies

TL;DR

This paper revisits the deuteron breakup process at low energies, demonstrating that including closed channels in the continuum-discretized coupled-channels method (CDCC) aligns its results with the Faddeev-Alt-Grassberger-Sandhas theory (FAGS).

Contribution

It shows that accounting for closed channels in CDCC significantly improves agreement with FAGS in low-energy deuteron breakup calculations.

Findings

Including closed channels improves CDCC accuracy.

Good agreement between CDCC and FAGS achieved.

Re-examination resolves previous discrepancies.

Abstract

We re-examine the deuteron elastic breakup cross sections on 12C and 10Be at low incident energies, for which a serious discrepancy between the continuum-discretized coupled-channels method (CDCC) and the Faddeev-Alt-Grassberger-Sandhas theory (FAGS) was pointed out. We show the closed-channels neglected in the preceding study affect significantly the breakup cross section calculated with CDCC, resulting in good agreement with the result of FAGS.