ar X iv : h ep - p h / 01 06 16 2 v 1 1 5 Ju n 20 01 Calculation of the cross section for the pion diffractive dissociation into two jets

ar X iv : h ep - p h / 02 06 14 4 v 1 1 7 Ju n 20 02 The pion diffractive dissociation into two jets

The method used and results obtained are described for calculation of the cross section for the pion diffractive dissociation into two jets. The main new qualitative result is that the distribution of longitudinal momenta for jets is not simply proportional to the profile of the pion wave function φ π (x), but depends on it in a complicated way. In particular, it is shown that under conditions ...

ar X iv : h ep - p h / 01 06 27 4 v 1 2 5 Ju n 20 01 STATUS OF HARD INTERACTIONS ( JETS AND HEAVY FLAVOR

We review the status of hard interactions, in particular of jet and heavy flavor production , at HERA and LEP. Emphasis is given to recent theoretical developments. Instantons, event shapes, and prompt photons are also briefly discussed.

ar X iv : h ep - p h / 01 06 17 2 v 1 1 5 Ju n 20 01 Unified approach to hard diffraction

Using a combination of S-Matrix and perturbative QCD properties in the small x Bj regime, we propose a formulation of hard diffraction unifying the partonic (Ingelman-Schlein) Pomeron, Soft Colour Interaction and QCD dipole descriptions.

ar X iv : h ep - p h / 01 01 20 3 v 1 1

Following prior analysis for measured pp elastic differential cross section, the impact parameter representation in terms of profile functions is calculated from two different parameterizations on single diffractive dissociation data. The derivative of this quantity with respect to the collision energy squared s measures the growth rate of the reaction’s blackness. Its distribution in impact pa...

ar X iv : h ep - p h / 01 06 21 1 v 1 1 9 Ju n 20 01 Interference effects in the decay φ → π 0 π 0 γ and the coupling constant g