Compton scattering off proton in the third resonance region

Abstract

Compton scattering off the proton in the third resonance region is analyzed for the first time, owing to the full combined analysis of pion- and photo-induced reactions in a coupled-channel effective Lagrangian model with K-matrix approximation. Two isospin $I=3/2$ resonances $D_{33}(1700)$ and $F_{35}(1930)$ are found to be essential in the range of 1.6 - 1.8 GeV. The recent beam asymmetry data of Compton scattering from the GRAAL facility are used to determine the helicity couplings of these resonances, and strong constraints are coming also from $\pi N$ and $K\Sigma$ photoproduction data. The possible spin and parity of new narrow resonances is discussed.

7 pages, 2 figs, 2 tabs, publish version

References in corpus (8)

• Evidence for a narrow structure at W~1.68 GeV in eta photoproduction on the neutron
• eta-photoproduction in the resonance energy region
• Evidence for Narrow N*(1685) Resonance in Quasifree Compton Scattering on the Neutron
• Insight into the narrow structure in {\boldmath{$\eta$}}-photoproduction on the neutron from helicity dependent cross sections
• Role of a triangle singularity in the $\pi \Delta$ decay of the $N(1700)(3/2^{-})$
• Evidence for narrow resonant structures at $W\approx 1.68$ and $W\approx 1.72$ GeV in real Compton scattering off the proton
• Is there a narrow $N(1685)$?
• High-precision Measurements of piP Elastic Differential Cross Sections in the Second Resonance Region

Cited by in corpus (3)

• Photoproduction of hidden-bottom pentaquark and related topics
• Nucleon resonances in Compton scattering
• Photo- and electro-production of narrow exotic states: from light quarks to charm and up to bottom