A new $N^{\ast }(1675)$ resonance in the $\gamma N\to \eta N$ reaction

Abstract

We study the $\eta$-photoproduction focusing on the new nucleon resonance which was observed at $\sqrt{s}=1675$ MeV with a narrow decay width ($\sim 10$ MeV) in the recent GRAAL experiment. Using an effective Lagrangian approach, we compute differential cross sections for the $\eta$-photoproduction. In addition to $N^{\ast }(1675)$, we employ three other nucleon resonances, i.e. $N^{\ast }(1535)$, $N^{\ast }(1650)$ and $N^{\ast }(1710)$, and vector meson exchanges which are the most relevant ones to this reaction process. As a result, we can reproduce the GRAAL data qualitatively well and observe obvious isospin asymmetry between the transition magnetic moments of $N^{\ast }(1675)$: ${\mu }_{\gamma n{n}^{\ast }}\gg {\mu }_{\gamma p{p}^{\ast }}$.

10 pages, 9 figures. Accepted for publication in Phys. Lett. B

References in corpus (8)

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• Extraction of radiative decay width for the non-strange partner of Theta^+
• Exotic and nonexotic magnetic transitions in the context of the SELEX and GRAAL experiments
• Suppression of Theta^+(J^P=3/2^(+,-)) photoproduction from the proton
• Spin 3/2 Pentaquark Resonance Signature in Lattice QCD
• Spin 3/2 Penta-quarks in anisotropic lattice QCD
• Decay of Theta+ in a quark model
• Eta photoproduction on the neutron at GRAAL: Measurement of the differential cross section

Cited by in corpus (36)

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• Light Baryon Spectroscopy
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• Photoproduction of eta-mesons on the deuteron above S11(1535) in the presence of a narrow P11(1670) resonance
• Photoproduction of $\eta$ mesons off neutrons from a deuteron target
• $\eta$ photoproduction on the quasi-free nucleons in the chiral quark model
• 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
• Evidence for the J^p=1/2^+ narrow state at 1650 MeV in the photoproduction of KLambda
• Helicity-dependent cross sections and double-polarization observable E in eta photoproduction from quasi-free protons and neutrons
• Mass splittings of SU(3) baryons within a chiral soliton model
• Evidence for narrow resonant structures at $W\approx 1.68$ and $W\approx 1.72$ GeV in real Compton scattering off the proton
• Axial-vector transitions and strong decays of the baryon antidecuplet in the self-consistent SU(3) chiral quark-soliton model
• Photoproduction of eta mesons from the neutron: cross sections and double polarization observable E
• eta photoproduction and N* resonances
• Vector transition form factors of the $N{K}^{\ast }\to {\Theta }^{+}$ and $N{\bar{K}}^{\ast }\to {\Sigma }_{\overline{10}}^{\ast -}$ in the SU(3) chiral quark-soliton model
• $K^0\Lambda$ photoproduction off the neutron with nucleon resonances
• Is there a narrow $N(1685)$?
• Quark spin content of the proton, hyperon semileptonic decays, and the decay width of the ${\Theta }^{+}$ pentaquark
• Observation of Narrow $N^{+}(1685)$ and $N^0(1685)$ Resonances in $\gamma N\to \eta \pi N$ Reactions
• Effects of nucleon resonances on $\eta$ photoproduction off the neutron reexamined
• On strange SU(3) partners of Theta+
• Evidence for a narrow N(1685) resonance in eta photoproduction off the nucleon
• Search for narrow resonances in $\pi p$ elastic scattering from the EPECUR experiment
• Mass splittings of the baryon decuplet and antidecuplet with the second-order flavor symmetry breakings within a chiral soliton model
• Electric properties of the baryon anti-decuplet in the SU(3) chiral quark-soliton model
• On Narrow Nucleon Excitation N*(1685)
• New Narrow $N(1685)$ and $N(1726)$? Remarks on the Interpretation of the Neutron Anomaly as an Interference Phenomenon
• Effect of the final state interaction of ${\eta }^{\prime }N$ on the ${\eta }^{\prime }$ photoproduction off nucleon
• Pentaquark Theta^+ production via gamma N ->K^*bar Theta^+(3/2^(+-))
• Search for the $N$(1685) in $\eta \pi$-Photoproduction
• New narrow N*(1685) resonance: review of observations
• A new nucleon resonance in eta photoproduction
• New narrow nucleon resonances $N^{\ast }(1685)$ and $N^{\ast }(1726)$ within the chiral quark-soliton model
• Photoproduction off the nucleon revisited: Evidence for a narrow N(1688) resonance?