Comment on "Sequential Single-Pion Production Explaining the Dibaryon "$d^{\ast }(2380)$" Peak"

Abstract

In arxiv: 2102.05575 a two-step process $pn\to (pp){\pi }^{-}\to (\Delta N){\pi }^{-}\to (d{\pi }^{+}){\pi }^{-}$ was calculated by using experimental total cross sections for the single-pion production processes $pn\to pp{\pi }^{-}(I=0)$ and $pp\to d{\pi }^{+}$. As a result the authors obtain a resonance-like structure for the total $pn\to d{\pi }^{+}{\pi }^{-}$ cross section of about the right size and width of the observed $d^{\ast }(2380)$ peak at an energy about 40 MeV below the $d^{\ast }(2380)$ mass. We object both the results of the sequential process calculation and its presentation as an alternative to the dibaryon interpretation.

Comments: Comment on arXiv:2102.05575