Vector meson photoproduction studied in its radiative decay channel

Abstract

We provide an analysis of vector meson photoproduction in the channel of the vector meson decaying into a pseudoscalar meson plus a photon, i.e. $V\to P\gamma$. It is shown that non-trivial kinematic correlations arise from the measurement of the $P\gamma$ angular distributions in the overall c.m. system in comparison with those in the vector-meson-rest frame. In terms of the vector meson density matrix elements, the implication of such kinematic correlations in the measurement of polarization observables is discussed. For the $\omega$ meson production, due to its relatively large branching ratios for $\omega \to {\pi }^0\gamma$, additional events from this channel may enrich the information about the reaction mechanism and improve the statistics of the recent measurement of polarized beam asymmetries by the GRAAL Collaboration. For $\varphi \to \eta \gamma$, $\rho \to \pi \gamma$, and $K^{\ast }\to K\gamma$, we expect that additional information about the spin structure of the vector meson production vertex can be derived.

Revtex, 14 pages, 2 eps figures; Version accepted by PRC

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Cited by in corpus (8)

• Progress Toward Understanding Baryon Resonances
• Photoproduction of ω Mesons off the Proton
• Beam asymmetry in near threshold omega photoproduction off the proton
• Exclusive neutrino-production of a charmed vector meson and transversity gluon GPDs
• Chiral Structure of Vector and Axial-Vector Tetraquark Currents
• Polarization degrees of freedom in near-threshold photoproduction of omega mesons in the pi^0 gamma decay channel
• Nondiffractive feature of $\gamma N\to {\rho }^{\pm }N$ with $\rho$-meson electromagnetic multipole moments
• Selected vector-meson decay-distributions in reactions of polarized photons with protons