First measurement of the circular beam asymmetry in the gamma p --> pi0 eta p reaction

Abstract

The circular photon asymmetry for pi0 eta photoproduction on the proton was measured for the first time at the tagged photon facility of the MAMI C accelerator using the Crystal Ball/TAPS photon spectrometer. The experimental results are interpreted within a phenomenological isobar model that confirms the dominant role of the Delta(1700)D33 resonance. The measured asymmetry allows us to identify small contributions from positive-parity resonances via interference terms with the dominant D33 amplitude.

arXiv comment11 pages, 3 figures, submitted to Phys.Lett. B

References in corpus (12)

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• Upgrade of the Glasgow photon tagging spectrometer for Mainz MAMI-C
• Chiral dynamics in the gamma p --> pi^0 eta p and gamma p --> pi^0 K^0 Sigma^+ reactions
• Polarization Observables for Two-Pion Production off the Nucleon
• Study of the reaction $\gamma p\to p{\pi }^0\eta$
• Beam-Helicity Asymmetries in Double-Charged-Pion Photoproduction on the Proton
• Photoproduction of pi^0 eta on protons and the Delta(1700)D_{33} resonance
• Beam-Helicity Asymmetries in Double Pion Photoproduction off the Proton
• Photoproduction of meson pairs: First measurement of the polarization observable I^s
• Isobar model analysis of pi0-eta photoproduction on protons
• Helicity asymmetries in double pion photoproduction on the proton
• Analysis of angular distributions in gamma N \to pi0 eta N

Cited by in corpus (18)

• Progress Toward Understanding Baryon Resonances
• Photoproduction Reactions and Non-Strange Baryon Spectroscopy
• Photoproduction of mesons off nuclei
• Measurement of the beam-helicity asymmetry $I^{\odot }$ in the photoproduction of ${\pi }^0{\pi }^{\pm }$-pairs off protons and off neutrons
• Study of the $\gamma p\to {\pi }^0\eta p$ reaction with the A2 setup at MAMI
• Photoproduction ofeta-pi pairs off nucleons and deuterons
• Polarization observables in ${\pi }^0\eta$-photoproduction on the proton
• Coherent π0η photoproduction on s-shell nuclei
• First measurement of direct photoproduction of the $a_2(1320{)}^0$ meson on the proton
• First measurement of target and beam-target asymmetries in the $\gamma p\to {\pi }^0\eta p$ reaction
• First measurement of helicity-dependent cross sections in pi0-eta photoproduction from quasi-free nucleons
• Study of the partial wave structure of ${\pi }^0\eta$ photoproduction on protons
• Coherent photoproduction of the neutral pion and eta meson on the deuteron at incident energies below 1.15 GeV
• Partial wave expansion for photoproduction of two pseudoscalars on a nucleon
• Measurement of the beam-helicity asymmetry in photoproduction of ${\pi }^0\eta$ pairs on carbon, aluminum, and lead
• Search for the $N$(1685) in $\eta \pi$-Photoproduction
• Quasi-free photoproduction of pion-pairs off protons and neutrons
• Target and beam-target asymmetry measurements at MAMI