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.

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

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Cited by in corpus (32)

• The nature of the Lambda(1405) resonance in chiral dynamics
• Threshold cusps and triangle singularities in hadronic reactions
• Strangeness in Nuclei and Neutron Stars
• Baryonic resonances close to the Kbar-N threshold: the case of Lambda(1405) in pp collisions
• On the isospin 0 and 1 resonances from $\pi \Sigma$ photoproduction data
• Review of the $\mathbf{\Lambda }$(1405): A curious case of a strange-ness resonance
• Lambda(1405) poles obtained from pi0-Sigma0 photoproduction data
• QCD and the Strange Baryon Spectrum
• The pole structure of the Lambda(1405) in a recent QCD simulation
• On the nature of the $\Lambda (1405)$ and $\Lambda (1670)$ from their $N_c$ behavior in chiral dynamics
• Strategy to find the two $\Lambda (1405)$ states from lattice QCD simulations
• Antikaon interactions with nucleons and nuclei
• Faddeev-Chiral Unitary Approach to the $K^{-}d$ scattering length
• Associated strangeness production in the pp to pK^+K^-p and pp to pK^+ pi^0 Sigma^0 reactions
• Kaon induced Lambda(1405) production on a deuteron target at DAFNE
• Antineutrino induced Lambda(1405) production off the proton
• The $K^{-}p\to {\Sigma }^0{\pi }^0$ reaction at low energies in a chiral quark model
• Single-pole nature of Lambda (1405) and structure of K-pp
• Isospin mixing effects in low-energy $\bar{K}N-\pi \Sigma$ interaction
• The role of the triangle singularity in $\Lambda (1405)$ production in the ${\pi }^{-}p\to K^0\pi \Sigma$ and $pp\to p{K}^{+}\pi \Sigma$ processes
• Resonant formation of Lambda(1405) by stopped-K- absorption in deuteron
• $\Lambda (1405)$ production in the process ${\chi }_{c0}(1P)\to \bar{\Lambda }\Sigma \pi$
• Theoretical analysis of Lambda(1405) --> (Sigma pi)^0 mass spectra produced in p+p --> p + Lambda(1405) + K^+ reactions
• Investigation of the Lambda(1405) line shape observed in pp collisions
• Role of the $N^{\ast }(2080)$ in $pp\to p{K}^{+}\Lambda (1520)$ and ${\pi }^{-}p\to K^0\Lambda (1520)$ reactions
• Theoretical study of the Lambda(1405) resonance in Xi_b^0 -> D^0 pi Sigma decay
• The Lambda(1405) state in a chiral unitary approach with off-shell corrections to dimensional regularized loop functions
• Low energy reaction $K^{-}p\to \Lambda \eta$ and the negative parity $\Lambda$ resonances
• New insights in \bar{K}N scattering and the Λ(1405)
• Deduction of $M(Sigmapi)$ for $Lambda(1405)$ with mixed $T_{Sigmapileftarrow{K}^{-}p}and{T}_{SigmapileftarrowSigmapi}$ from Hemingway's data
• Excited Hyperons Produced in Proton-Proton Collisions with Anke@COSY
• $\Lambda (1405)$ observations in p+p and K${}^{-}$-induced reactions