Absorptive corrections and Regge singularities

Radiative Corrections to Qcd Amplitudes in Quasi - Multi - Regge Kinematics

Radiative corrections to QCD amplitudes in the quasi-multi-Regge kinematics are interesting in particular since the Reggeized form of these amplitudes is used in the derivation of the NLO BFKL. This form is a hypothesis which must be at least carefully checked, if not proved. We calculate the radiative corrections in the one-loop approximation using the s-channel unitarity. Compatibility of the...

Effect of absorptive corrections on inclusive parton distributions

We study the effect of absorptive corrections due to parton recombination on the parton distributions of the proton. A more precise version of the GLRMQ equations, which account for non-linear corrections to DGLAP evolution, is derived. An analysis of HERA F2 data shows that the small-x gluon distribution is enhanced at low scales when the absorptive effects are included, such that a negative g...

Additions and Corrections

Diffractive Structure Function at Very Small Β and Unitarity Corrections in the Color Dipole Regge Approach

Starting from the phenomenologically successful color dipole representation of the diffractive structure function, we identify the dominant contribution to the diffractive cross section at small beta. The beta dependence is calculated taking advantage of the Regge factorization properties of the hard mechanism which drives the dependence on the diffractive mass. We impose the unitarity constrai...

Singularities of the closed RWmetric in Regge Calculus: a generalized evolution of the 600-cell

An evolution scheme is developed, based on Sorkin algorithm, to evolve the most complex regular tridimensional polytope, the 600-cell. The solution of 600-cell, already studied before, is generalized by allowing a larger number of free variables. The singularities of Robertson–Walker (RW) metric are studied and a reason is given why the evolution of the 600-cell stops when its volume is still f...