Anomalous t-dependence in diffractive electroproduction of 2S radially excited light vector mesons at HERA

Within the color dipole gBFKL dynamics applied to the diffraction slope we predict an anomalous t dependence of the differential cross section as a function of energy and Q^2 for production of radially excited V'(2S) light vector mesons in contradiction with a well known standard monotonous t- behaviour for V(1S) mesons. The origin of this phenomenon is based on the interplay of the nodal structure of V'(2S) radial wave function with the energy and dipole size dependence of the color dipole cross section and of the diffraction slope. We present how a different position of the node in V'(2S) wave function leads to a different form of anomalous t- behaviour of the differential cross section and discuss a possibility how to determine this position from the low energy and HERA data.Comment: 15 pages and 2 figure

Parton Rescatterings in Large-x Nuclear Suppression at RHIC

We demonstrate that strong suppression of the relative production rate (d+Au)/(p+p) of inclusive high-pT hadrons at forward rapidities observed at RHIC is due to parton multiple rescatterings in nuclear matter. The light-cone dipole approach-based calculations are in a good agreement with BRAHMS and STAR data. They also indicate a significant nuclear suppression at midrapidities with a weak onset of the coherence effects. This prediction is supported by the preliminary d+Au data from the PHENIX Collaboration. Moreover, since similar suppression pattern is also expected to show up at lower energies where effects of parton saturation are not expected, we are able to exclude from the interpretation of observed phenomena models based on the Color Glass Condensate.Comment: 6 pages, 3 figures. Talk given at XXXVIII International Symposium on Multiparticle Dynamics (ISMD-08), DESY, Hamburg, Germany, 15-20 Sep 2008, and talk given at XIX International Baldin Seminar on High Energy Physics Problems (Baldin-08), Dubna, Russia, 29 Sep - 4 Oct 200