Kaon induced Lambda(1405) production on a deuteron target at DAFNE

TL;DR

This paper investigates the production of Lambda(1405) via kaon-induced reactions on deuteron targets at DAFNE, highlighting optimal conditions for observing the resonance and its dominant production channels.

Contribution

It provides a detailed analysis of Lambda(1405) production mechanisms in kaon-deuteron interactions, emphasizing the role of kaon momentum and scattering processes at DAFNE.

Findings

Higher mass Lambda(1405) at 1420 MeV is predominantly produced.

Fast kaons from phi decay enhance resonance visibility.

Forward neutron selection reduces single scattering, highlighting double scattering signals.

Abstract

The K^- induced production of Lambda(1405) in the K^- d to pi Sigma n reaction is investigated having in mind the conditions of the DAFNE facility at Frascati where kaons are obtained from the decay of slow moving phi mesons. We find that the K^- d to Lambda(1405) n process favors the production of Lambda(1405) initiated by the K^- p channel, which gives largest weight to the higher mass Lambda(1405) appearing at 1420 MeV in chiral theories. We find that the fastest kaons from the decay of the phi are well suited to see this resonance, particularly if one selects forward going neutrons in the center of mass, which reduce the contribution of single scattering and make the double scattering dominate where the signal of the resonance appears clearer.