$ω$ and $ρ$ Photoproduction with an Effective Quark Model Lagrangian

Details $ω$ and $ρ$ Photoproduction with an Effective Quark Model Lagrangian $ω$ and $ρ$ Photoproduction with an Effective Quark Model Lagrangian

1998-03-05

arxiv.org/abs/nucl-th/9803015v1

Phys.Lett. B436 (1998) 42-48

Physics

Nuclear Physics

Nuclear Theory

7 pages, 3 PS figures, submitted to PRL

Scientific paper

10.1016/S0370-2693(98)00894-6

An unified approach for vector meson photoproduction is presented in the constit quark model. The s- and u-channel resonance contributions are generated using an effective quark vector-meson Lagrangian. In addition, taking into account $\pi^0$ and $\sigma$ t-channel exchanges for diffractive production, the available total and differential cross section data for $\omega$, $\rho^0$, $\rho^+$, and $\rho^-$ photoproduction can be well described with the same quark model parameter set. Our results clearly indicate that polarization observables are essential to identify so-called "missing" resonances.

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