The role of the $\Lambda (1405)$ in the $pp\to p{K}^{+}\Lambda (1405)$ reaction

Abstract

We report a theoretical study of the $pp\to p{K}^{+}\Lambda (1405)$ reaction, which was recently investigated at COSY-Jülich by using a 3.65 GeV/c circulating proton beam incident on an internal hydrogen target. The reaction is driven by single kaon exchange, single pion exchange, and single rho exchange terms which have very different shapes due to the two pole structure of the $\Lambda (1405)$ and the presence of background terms. The shape for the sum of the three contributions, as well as the total cross section, are consistent with present data within experimental and theoretical uncertainties, using reasonable form factors for the meson-baryon vertices.

version to appear in European Physical Journal A; theoretical uncertainties reanalyzed, data updated according to the experiment

References in corpus (5)

• K^- p scattering length from scattering experiments
• On the Strangeness -1 S-wave Meson-Baryon Scattering
• New results on the Roper resonance and the P_{11} partial wave
• The spectral function of the omega meson in nuclear matter from a coupled-channel resonance model
• The radiative decay of the $\Lambda (1405)$ and its two-pole structure

Cited by in corpus (9)

• Threshold cusps and triangle singularities in hadronic reactions
• Strangeness in Nuclei and Neutron Stars
• Review of the $\mathbf{\Lambda }$(1405): A curious case of a strange-ness resonance
• QCD and the Strange Baryon Spectrum
• On the nature of the $\Lambda (1405)$ and $\Lambda (1670)$ from their $N_c$ behavior in chiral dynamics
• Faddeev-Chiral Unitary Approach to the $K^{-}d$ scattering length
• Antineutrino induced Lambda(1405) production off the proton
• Kaon induced Lambda(1405) production on a deuteron target at DAFNE
• Excited Hyperons Produced in Proton-Proton Collisions with Anke@COSY