Clues to the nature of the Delta^*(1700) resonance from pion- and photon-induced reactions

Abstract

We make a study of the (pi^- p --> K^0 pi^0 Lambda), (pi^+ p --> K^+ pi^+ Lambda), (K^+\bar{K}^0 p), (K^+ pi^+ Sigma^0), (K^+ pi^0 Sigma^+), and (eta pi^+ p) reactions, in which the basic dynamics is given by the excitation of the Delta^*(1700) resonance which subsequently decays into (K Sigma^*(1385)) or (Delta(1232) eta). In a similar way we also study the (gamma p --> K^0 pi^+ Lambda), (K^+ pi^- Sigma^+), (K^+ pi^+ Sigma^-), (K^0 pi^0 Sigma^+), and (eta pi^0 p) related reactions. The cross sections are proportional to the square of the coupling of Delta^*(1700) to (Sigma^*K), (Delta eta) for which there is no experimental information but which is provided in the context of coupled channels chiral unitary theory where the Delta^*(1700) is dynamically generated. Within present theoretical and experimental uncertainties one can claim a global qualitative agreement between theory and experiment. We provide a list of items which need to be improved in order to make further progress along these lines.

11 pages, 5 figures

References in corpus (1)

• Unitary coupled channel analysis of the $\Lambda (1520)$ resonance

Cited by in corpus (11)

• The s-wave charmed baryon resonances from a coupled-channel approach with heavy quark symmetry
• Nucleon and Delta resonances in K Sigma(1385) photoproduction from nucleons
• Open charm meson in nuclear matter at finite temperature beyond the zero range approximation
• Radiative decay of the Delta(1700)
• Evaluation of the polarization observables I^S and I^C in the reaction gamma p --> pi^0 eta p
• Photoproduction ofeta-pi pairs off nucleons and deuterons
• $\Lambda$ and $\Sigma$ Excitations and the Quark Model
• On the background in the $\gamma p\to \omega ({\pi }^0\gamma )p$ reaction and mixed event simulation
• S-wave and P-wave pion-pion and kaon-pion contributions to three-body decay processes in the Resonance-Spectrum Expansion
• Theoretical study of the $\gamma d\to {\pi }^0\eta d$ reaction
• Photo- and Electron-Production of Mesons on Nucleons and Nuclei