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.

11 pages, 3 figures, submitted to Phys.Lett. B

References in corpus (3)

• Upgrade of the Glasgow photon tagging spectrometer for Mainz MAMI-C
• Beam-Helicity Asymmetries in Double Pion Photoproduction off the Proton
• Analysis of angular distributions in gamma N \to pi0 eta N

Cited by in corpus (7)

• Measurement of the beam-helicity asymmetry $I^{\odot }$ in the photoproduction of ${\pi }^0{\pi }^{\pm }$-pairs off protons and off neutrons
• Photoproduction ofeta-pi pairs off nucleons and deuterons
• Polarization observables in ${\pi }^0\eta$-photoproduction on the proton
• 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
• Coherent photoproduction of the neutral pion and eta meson on the deuteron at incident energies below 1.15 GeV
• Target and beam-target asymmetry measurements at MAMI