Abstract. The Nijmegen Unitarized Meson Model and its application to scalar mesons is briefly revisited. It is shown that all scalar states up to 1.5 GeV can be described as 3P0 qq̄ states coupled to the OZI-allowed open and closed two-meson channels consisting of pseudoscalar and vector mesons. Crucial are the manifestation of a resonancedoubling phenomenon, typical for strong S-wave decay, and...

We propose to study quark-hadron duality in meson electroproduction. While duality between inclusive electron-hadron scattering in the resonance and deep inelastic regimes (Bloom-Gilman or quark-baryon duality) is well established, the existence of a similar duality in meson electroproduction has not yet been tested. In the inclusive case, duality implies that single-quark scattering governs th...

A bstract At leading order, there are three inelastic scattering processes beginning with a quantum kink and fundamental meson. Meson multiplication, in which the final state is two mesons, was treated recently. In this note we treat other two, (anti)-Stokes scattering, kink’s shape mode (de-)excited contains one case of general scalar kink, find analytic formulas for forward backward amplitude...

Both meson photoproduction and semi-inclusive deep inelastic scattering can potentially probe transversity in the nucleon. We explore how that potential can be realized dynamically. The role of rescattering in both exclusive and inclusive meson production as a source for transverse polarization asymmetry is examined. We use a dynamical model to calculate the asymmetry and relate that to the tra...

During several years, the Meson Physics Laboratory performs at the pion channel of the PNPI synchrocyclotron a wide program of investigation pion-nucleon scattering in the region of low-lying πN resonances. At the first stages of this program, precision measurements of the differential cross sections, polarization parameters P and spin rotation parameters A and R were made for πр elastic scatte...

In the framework of model motivated by perturbative calculations in QCD we estimate the differential and total cross sections for both the photoproduction of vector D *-mesons and their yield in deep inelastic scattering at the HERA collider. The offered model allows us to take into account higher twists over the transverse momentum of meson at p T ∼ m c and correctly to approach the dominance ...

Relations between scattering and production amplitudes are studied in a microscopic multichannel model for meson-meson scattering, with coupling to confined quark-antiquark channels. Overlapping resonances and a proper threshold behaviour are treated exactly in the model. Under the spectator assumption, it is found that the two-particle production amplitude shares a common denominator with the ...

We investigate $\ensuremath{\pi}\ensuremath{\rho}$ scattering based on the coupled-channel formalism with and $K{\overline{K}}^{*}$ ($\overline{K}{K}^{*}$) channels included. construct kernel amplitudes by using meson-exchange model compute coupled integral equation for scattering. By performing partial-wave expansion, we show explicitly that ${a}_{1}(1260)$ meson is dynamically generated forma...

The process of exclusive heavy vector meson photoproduction, γp → V p, is studied in the framework of QCD factorization. The mass of the produced meson, V = Υ or J/Ψ, provides a hard scale for the process. We demonstrate, that in the heavy quark limit and at the one-loop order in perturbation theory, the amplitude factorizes in a convolution of a perturbatively calculable hard-scattering amplit...

We evaluate quasielastic double-differential antineutrino cross sections obtained in a phenomenological model based on the superscaling behavior of electron scattering data and estimate the contribution of the vector meson-exchange currents in the two-particle-two-hole sector. We show that the impact of meson-exchange currents for charge-changing antineutrino reactions is much larger than in th...