Strangeness production from pp collisions

TL;DR

This paper reviews recent studies on strangeness production in proton-proton collisions, highlighting the dominant role of certain resonances near thresholds and emphasizing their importance for understanding nuclear matter.

Contribution

It identifies previously ignored resonances as key contributors to strangeness production, providing new insights for future research in pp and heavy ion collisions.

Findings

Delta*(1620) and N*(1535) resonances are dominant near-threshold contributions.

Inclusion of these resonances is crucial for accurate modeling.

Findings impact understanding of high energy and density nuclear matter.

Abstract

The study of the strangeness production from pp collisions plays important roles in two aspects: exploring the properties of baryon resonances involved and understanding the strangeness production from heavy ion collisions to explore the properties of high energy and high density nuclear matter. Here we review our recent studies on several most important channels for the strangeness production from pp collisions. The previously ignored contributions from Delta*(1620) and N*(1535) resonances are found to play dominant role for the pp --> n K+ Sigma+, pp --> pK+ Lambda and pp --> pp phi reactions near-thresholds. These contributions should be included for further studies on the strangeness production from both pp collisions and heavy ion collisions.