ar X iv : h ep - p h / 01 10 26 8 v 3 1 6 N ov 2 00 1 Gluonic effects in vector meson photoproduction at large momentum transfers

ar X iv : h ep - p h / 01 10 26 8 v 2 1 5 N ov 2 00 1 Gluonic effects in vector meson photoproduction at large momentum transfers

Non-perturbative QCD mechanisms are of fundamental importance in strong interaction physics. In particular, the flavor singlet axial anomaly leads to a gluonic pole mechanism which has been shown to explain the η ′ mass, violations of the OZI rule and more recently the proton spin. We show here that the interaction derived from the gluonic pole exchange explains the high momentum transfer behav...

ar X iv : h ep - p h / 01 10 26 8 v 1 1 9 O ct 2 00 1 Gluonic effects in vector meson photoproduction at large momentum transfers

The gluonic pole has been instrumental in explaining the mass of the η ′ and providing a plausible explanation for solving the spin crisis. We show that it also plays an important role in the description of the photoproduction of vector mesons at high momentum transfers at JLab energies. Recently the CLAS Collaboration at JLab has published new data on ρ-and φ-meson photoproduction at large mom...

ar X iv : h ep - p h / 06 11 27 1 v 1 2 1 N ov 2 00 6 Structure of the axial - vector meson D s 1 ( 2460 )

ar X iv : h ep - p h / 06 11 27 1 v 2 2 2 N ov 2 00 6 Structure of the axial - vector meson D s 1 ( 2460 )

ar X iv : h ep - p h / 06 11 23 8 v 1 1 7 N ov 2 00 6 K ∗ - couplings for the antidecuplet excitation

We estimate the coupling of K∗ vector meson to the N → Θ transition employing the unitary simmetry, vector meson dominance, and results of the GRAAL Collaboration on the η photoproduction off the neutron. Our small numerical value confirms that the CLAS Collaboration null results do not contradict to theoretical expectations for the Θ-production. We also estimate the K∗-coupling for the N → Σ∗ ...