Comment on "Hadronic $^3$He$\eta$ production near threshold"

TL;DR

This paper critiques previous theoretical comparisons of $p d o ^3$He $ a$ reaction data, emphasizing the need for more accurate models to correctly interpret the reaction mechanism and partial wave contributions.

Contribution

It provides revised conclusions on the reaction mechanism by employing improved theoretical models, correcting misleading earlier interpretations.

Findings

Previous models used ad hoc assumptions leading to misleading conclusions.

Revised models suggest different roles for higher partial waves in the reaction.

Accurate theoretical modeling is crucial for understanding the reaction mechanism.

Abstract

Measurements of the differential and total cross sections for the $p d \to ^3$He $\eta$ reaction at five energies were recently reported [Phys. Rev. C {\bf 75}, 014004 (2007)] and comparisons with theoretical models were made. We point out that these comparisons involved a model based on ad hoc assumptions and hence the conclusions regarding the reaction mechanism as well as the role of the higher partial waves drawn in the above work are misleading. Revised conclusions based on better model calculations are presented.