Mikhail Braun

Triple pomeron vertex in the limit N(c) ---> infinity

In the hard pomeron theory with the number of colours Nc in the infinity limit the diffractive amplitude obtained in [3] is compared with the results found for Nc=3 in [1] and in the dipole approach in [5]. It is shown that the double pomeron exchange contribution can be substituted by an equivalent triple pomeron interaction term. After such a substitution the triple pomeron vertices in [1,3,5] essentially coincide. It is demonstrated that, in any form, the triple pomeron vertex is conformal invariant. It is also shown that higher order densities in the dipole approach do not involve 1 to k pomeron verteces with k>2 but are rather given by a set of pomeron fan diagrams with only a triple pomeron coupling.

Diffractive \(\eta_c\) photo-and electroproduction with the perturbative QCD Odderon

Abstract. Using a set of new odderon states, we calculate their contribution to the diffractive n

The bootstrap for impact factors and the gluon wave function

eta_c

The bootstrap and the 2nd order corrections for the interaction of two reggeized gluons

photo- and electroproduction process. Compared to previous simple 3-gluon exchange calculations we find an enhancement of about one order of magnitude in the cross section. The t-dependence of the cross section exhibits a dip structure in the small t region.

The double parton distributions in the hard pomeron model

Abstract Using the results recently obtained for the non-forward quark and gluon impact factors, it is shown that their form in the gluon colour channel is consistent with the “third bootstrap condition”, namely, that they should be proportional to the gluon wave function. The gluon wave function found from this assumption is used to write the full bootstrap condition for the gluonic potential in the next-to-leading order.

Properties of the hard pomeron with a running coupling constant and the high-energy scattering

The 2nd order corrections are obtained to both forward and nonforward interaction of reggeized gluons in the octet colour channel using as a basis the bootstrap relation and a specific ansatz to solve it. The obtained forward kernel coincides with the logarithmic term plus two first non-logarithmic terms in the Pomeron 2nd order kernel. Both forward and nonforward kernels are found to be infrared finite.Abstract The bootstrap relation is discussed up to the 2nd order. From the strong bootstrap condition and a specific ansatz to solve it the 2nd order corrections are obtained to both forward and nonforward interaction of reggeized gluons in the octet colour channel. The obtained forward kernel coincides with the logarithmic term plus two first non-logarithmic terms in the Pomeron 2nd order kernel. Both forward and nonforward kernels are found to be infrared finite.

Evolution of the gluon density in

Abstract. We study the double parton interaction process in collisions between highly virtual

Jet production from the perturbative QCD pomeron with a running coupling constant

q{bar q}

Triple pomeron vertex in the limit \(N_c\rightarrow\infty\)

pairs in the BFKL regime. Explicit expressions for the double parton distributions are obtained both in the case of direct coupling of the BFKL pomerons to the

The process : a test for the perturbative QCD odderon

q{bar q}