Contribution of the "hanged" diagrams into the reaction $np \to np \pi^+ \pi^-$

TL;DR

This paper investigates the role of 'hanged' diagrams in the reaction np → np π+ π−, demonstrating that including these diagrams improves the description of the π+π− effective mass spectrum.

Contribution

It introduces the consideration of 'hanged' diagrams into the reaction analysis, providing a more accurate model of the mass spectrum.

Findings

Better fit to the π+π− mass spectrum with 'hanged' diagrams

Enhanced understanding of reaction mechanisms

Improved theoretical description

Abstract

The contribution of "hanged" diagrams into the reaction $np \rightarrow np \pi^+ \pi^-$ was considered. It was shown that taking into account of these diagrams permits to get better description of the effective mass spectrum of $\pi^+\pi^-$-combinations.