Carlo Ewerz

Jet rates at small x to single logarithmic accuracy

We present predictions of jet rates in deep inelastic scattering at small x to leading-logarithmic order in x, including all sub-leading logarithms of Q2/μR2 where μR is the transverse momentum scale at which jets are resolved. We give explicit results for up to three jets, and a perturbative expansion for multi-jet rates and jet multiplicities.

Unitarity corrections in high energy QCD

The high energy limit of QCD is investigated in the generalized leading logarithmic approximation. We study unitarity corrections to the BFKL Pomeron containing t-channel states with up to six gluons. Special attention is given to the field theory structure of the corresponding multi--gluon amplitudes. We discuss the transition from two to six gluons in the t-channel.

Azimuthal distribution of quark-antiquark jets in DIS diffractive dissociation

Abstract We investigate the azimuthal distribution of quark-antiquark jets in DIS diffractive dissociation with large transverse momentum. In this kinematical region the matrix element is expressed in terms of the gluon structure function. For the transverse part of the cross section we find a cos(2φ)-distribution with the maximum at φ = ±π 2 , i.e. the jets prefer a direction perpendicular to the electron plane. This is in contrast to boson gluon fusion where the q q jet cross section for transversely polarized bosons peaks at φ = 0 and φ = π. We discuss the origin of this striking difference and present numerical results relevant for the diffractive dissociation at HERA.We investigate the azimuthal distribution of quark-antiquark jets in DIS diffractive dissociation with large transverse momentum. In this kinematical region the matrix element is expressed in terms of the gluon structure function. For the transverse part of the cross section we find a

Towards a nonperturbative foundation of the dipole picture: II. High energy limit

\cos(2 \phi)

Effect of the charm quark mass on the BFKL γ∗γ∗ total cross section at LEP☆

-distribution with the maximum at

The odderon in high energy elastic pp scattering

\phi = \pm \pi/2

A model for soft high-energy scattering: Tensor pomeron and vector odderon

, i.e.\ the jets prefer a direction perpendicular to the electron plane. This is in contrast to boson gluon fusion where the

How Pomerons meet in coloured glass

q\bar{q}

Conformal invariance of unitarity corrections

jet cross section for transversely polarized bosons peaks at

On the Range of Validity of the Dipole Picture

\phi=0