High-energy central exclusive production of the lightest vacuum resonance related to the soft Pomeron

A simple model based on Regge approach is proposed for description of the central exclusive production (CEP) of the light tensor glueball lying on the Regge trajectory of the soft Pomeron.Comment: 8 pages; a few references have been adde

Current stage of understanding and description of hadronic elastic diffraction

Current stage of development of the high-energy elastic diffractive scattering phenomenology is reviewed. Verification of various theoretical models via comparison of their predictions with the recent D0 and TOTEM data on the nucleon-nucleon total and differential cross-sections is presented.Comment: Talk given at DIFFRACTION 2012, the 7th International Workshop on Diffraction in High-Energy Physics, September 10-15, 2012, Puerto del Carmen, Lanzarote, Canary Island

Nonlinear Regge Trajectories in Theory and Practice

The problems related to nonlinear behavior of Regge trajectories (RT) and their renormalization group invariance are discussed.Comment: The extended version of the talk at the International Workshop Diffraction-2008 (La Londe-les-Maures, France, September 9 - 14, 2008

Nonlinearity of vacuum reggeons and exclusive diffractive production of vector mesons at HERA

The processes of exclusive photo- and electroproduction of vector mesons $\rho^0$(770), $\phi$(1020) and $J/\psi$(3096) at collision energies $30 GeV<W<300 GeV$ and transferred momenta squared $0<-t<2 GeV^2$ are considered in the framework of a phenomenological Regge-eikonal scheme with nonlinear Regge trajectories in which their QCD asymptotic behavior is taken into account explicitly. By comparison of available experimental data from ZEUS and H1 Collaborations with the model predictions it is demonstrated that corresponding angular distributions and integrated cross-sections in the above-mentioned kinematical range can be quantitatively described with use of two $C$-even vacuum Regge trajectories. These are the "soft" pomeron dominating the high energy reactions without a hard scale and the "hard" pomeron giving an essential contribution to photo- and electroproduction of heavy vector mesons and deeply virtual electroproduction of light vector mesons.Comment: 25 pages, 12 figure

Elastic π+p\pi^{+}p and π+π+\pi^{+}\pi^{+} scattering at LHC

We discuss the possibility of measuring leading neutron production at the LHC. These data could be used to extract from it $\pi^+ p$ and $\pi^+\pi^+$ cross-sections. In this note we give some estimates for the case of elastic cross-sections and discuss related problems and prospects.Comment: 26 pages, 25 figures, to be published, minor text correction