Photoproduction of π⁰ η on protons and the Δ (1700)D33 -resonance

2009/01/31 by V. L. Kashevarov, A. Fix, P. Aguar-Bartolomé +77
Chemistry · Physics and Astronomy · #Atomic physics #Chemistry #Nuclear magnetic resonance #Nuclear physics #Nuclear physics research studies #Particle physics theoretical and experimental studies #Physics #Pi #Quantum Chromodynamics and Particle Interactions #Resonance (particle physics) #hep-ex

paper · pdf · doi:10.1140/epja/i2009-10868-4

published as Eur.Phys.J.A42:141-149,2009 · 9 pages, 11 figures

openalex publication_date 2009/10/01 · arxiv created 2009/11/09 · arxiv updated 2014/11/18 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

Total and differential cross sections for the reaction gamma p -> pi^o eta p have been measured with the Crystal Ball/TAPS detector using the tagged photon facility at the MAMI C accelerator in Mainz. In the energy range E_gamma=0.95-1.4 GeV the reaction is dominated by the excitation and sequential decay of the Delta(1700)D33 resonance. Angular distributions measured with high statistics allow us to determine the ratio of hadronic decay widths Γ_ηΔ/Γ_πS11 and the ratio of the helicity amplitudes A_3/2/A_1/2 for this resonance.

Citations

• Review of Particle Physics
• Relativistic chiral SU(3) symmetry, large-Nc sum rules and meson–baryon scattering
• Evidence for a Parity DoubletΔ(1920)P33andΔ(1940)D33fromγp→pπ0η
• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)

Cited by

• Role of a triangle singularity in the πN(1535) contribution to γp→pπ0η