ar X iv : h ep - p h / 03 04 12 2 v 1 1 2 A pr 2 00 3 What exactly is a parton density ?

ar X iv : h ep - p h / 03 04 12 2 v 2 2 3 A pr 2 00 3 What exactly is a parton density ?

I give an account of the definitions of parton densities, both the conventional ones, integrated over parton transverse momentum, and unintegrated transverse-momentum-dependent densities. The aim is to get a precise and correct definition of a parton density as the target expectation value of a suitable quantum mechanical operator, so that a clear connection to non-perturbative QCD is provided....

ar X iv : h ep - p h / 03 04 12 2 v 3 2 8 A pr 2 00 3 What exactly is a parton density ?

I give an account of the definitions of parton densities, both the conventional ones, integrated over parton transverse momentum, and unintegrated transverse-momentum-dependent densities. The aim is to get a precise and correct definition of a parton density as the target expectation value of a suitable quantum mechanical operator, so that a clear connection to non-perturbative QCD is provided....

ar X iv : h ep - p h / 03 04 15 1 v 1 1 5 A pr 2 00 3 Gluon Radiation and Parton Energy Loss

The propagation of hard partons through spatially extended matter leads to medium-modifications of their fragmentation pattern. Here, we review the current status of calculations of the corresponding medium-induced gluon radiation, and how this radiation affects hadronic observables at collider energies.

ar X iv : h ep - p h / 02 03 04 2 v 2 4 A pr 2 00 2 Once more on mixing of the a 0 ( 980 ) and f 0 ( 980 ) mesons

ar X iv : h ep - p h / 05 04 04 2 v 1 6 A pr 2 00 5 Strong interactions at all density

We show using Mean Field Theory that the phase diagram of QCD at finite density (T = 0) is such that chiral symmetry remains spontaeously broken at all density! Talk given at the Recontres Vietnam, Hanoi, August 2004