Polarization degrees of freedom in near-threshold photoproduction of omega mesons in the pi^0 gamma decay channel

Abstract

We study polarization variables in the photoproduction of omega-mesons with subsequent omega to gamma pi^0 decay. Single and double polarization observables are calculated as a function of different final-state angles. Reaction models include pomeron (natural parity) and pi^0 (unnatural parity) exchange in the t-channel. In addition, the contribution of s-channel resonances is considered. The sensitivity of the polarization observables to the reaction dynamics is discussed.

arXiv comment10 pages, 10 figures, explicit reference to sign of decay asymmetry added

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Cited by in corpus (6)

• $N^{\ast }$ decays to $N\omega$ from new data on $\gamma p\to \omega p$
• Proton-${\eta }^{\prime }$ interactions at threshold
• Nucleon resonances in $\gamma p\to \omega p$ reaction
• $N^{\ast }\to N{\eta }^{\prime }$ decays from photoproduction of ${\eta }^{\prime }$-mesons off protons
• Measurement of double polarisation asymmetries in $\omega$-photoproduction
• Photon beam asymmetry $\Sigma$ in the reaction $\vec{\gamma }p\to p\omega$ for $E_{\gamma }$ = 1.152 to 1.876 GeV