Photoproduction of meson pairs: First measurement of the polarization observable I^s

Abstract

The polarization observable I^s, a feature exclusive to the acoplanar kinematics of multi-meson final states produced via linearly polarized photons, has been measured for the first time. Results for the reaction g p -> p pi0 eta are presented for incoming photon energies between 970 MeV and 1650 MeV along with the beam asymmetry I^c. The comparably large asymmetries demonstrate a high sensitivity of I^s to the dynamics of the reaction. Fits using Bonn-Gatchina partial wave analysis demonstrate that the new polarization observables carry significant information on the contributing partial waves.

11 pages, 6 figures, v2 to appear in Phys. Lett. B

References in corpus (6)

• Measurement of the beam asymmetry in eta-photoproduction off the proton
• Baryon resonances and polarization transfer in hyperon photoproduction
• Linearly polarised photon beams at ELSA and measurement of the beam asymmetry in pi^0-photoproduction off the proton
• Evidence for a parity doublet Delta(1920)P_{33} and Delta(1940)D_{33}$ from γp\to pπ^0η
• 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 (28)

• Properties of baryon resonances from a multichannel partial wave analysis
• Progress Toward Understanding Baryon Resonances
• High statistics study of the reaction $\gamma p\to p{\pi }^0\eta$
• Light Baryon Spectroscopy
• Photoproduction Reactions and Non-Strange Baryon Spectroscopy
• Photoproduction of mesons off nuclei
• Photoproduction of ω Mesons off the Proton
• Photoproduction of ${\eta }^{\prime }$-mesons off the deuteron
• Measurement of the Beam Asymmetry $\Sigma$ in the Forward Direction for pi0 Photoproduction
• First measurement of the circular beam asymmetry in the gamma p --> pi0 eta p reaction
• Role of a triangle singularity in the $\pi N(1535)$ contribution to $\gamma p\to p{\pi }^0\eta$
• Isobar model analysis of pi0-eta photoproduction on protons
• Evaluation of the polarization observables I^S and I^C in the reaction gamma p --> pi^0 eta p
• Photoproduction ofeta-pi pairs off nucleons and deuterons
• Study of the $\gamma p\to {\pi }^0\eta p$ reaction with the A2 setup at MAMI
• Polarization observables in ${\pi }^0\eta$-photoproduction on the proton
• Coherent π0η photoproduction on s-shell nuclei
• 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
• Minimal complete sets for two pseudoscalar meson photoproduction
• 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
• Theory of two-pion photo- and electroproduction off the nucleon
• Theoretical study of the $\gamma d\to {\pi }^0\eta d$ reaction
• 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
• Target and beam-target asymmetry measurements at MAMI