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Nuclei are unique analyzers for the early stage of the space-time development of hadronization. DIS at medium energies is especially suitable for this task being sensitive to hadronization dynamics, since the production length is comparable with the nuclear size. This was the driving motivation to propose measurements at HERMES using nuclear targets, and to(More)
We present a space-time description of hadronization of highly virtual quarks originating from a deep-inelastic electron scattering (DIS). Important ingredients of our approach are the timeand energy–dependence of the density of energy loss for gluon radiation, the Sudakov’s suppression of no radiation, and the effect of color transparency, which suppresses(More)
Radiative energy loss of a highly virtual quark originating from a deep-inelastic electron scattering plays a crucial role in production of leading hadrons off nuclei. The density of energy loss for gluon radiation turns out to be timeand energy–dependent in inclusive hadron production. Important phenomena involved are Sudakov’s suppression of no radiation(More)
  • Jean - Jacques Dugne, Sverker Fredriksson, E. Predazzi
  • 1999
A new model for the substructure of quarks, leptons and weak gauge bosons is discussed. It is based on three fundamental and absolutely stable spin-1/2 preons. Its preon flavour SU(3) symmetry leads to a prediction of nine quarks, nine leptons and nine heavy vector bosons. One of the quarks has charge −4e/3, and is speculated to be the top quark (whose(More)
We discuss a scheme for reconstructing experimentally the diagonal elements of a density matrix representing quantum optical state. Applications to PDC heralded photons, multi-thermal and attenuated coherent states are illustrated and discussed in more detail.
The elastic hadronic amplitude is calculated using the nonperturbative light-cone dipole representation for gluon bremsstrahlung. The data for large mass diffraction demand a two-scale structure of light hadrons: the gluon clouds of the valence quarks are much smaller (∼ 0.3 fm) than the hadronic size. The presence of the two scales unavoidably leads to a(More)
The studies concerning the possible existence of a deterministic theory, of which quantum mechanics would be an approximation, date to the celebrated 1935 Einstein-PodolskyRosen paper. Since Bells proposal of 1964 various experiments were addressed to a general experimental test of local hidden variable theories, leading to strong indications favourable to(More)
We develop the color dipole gBFKL phenomenology of a diffraction cone for photoand electroproduction γN → V N of heavy vector mesons (charmonium & bottonium) at HERA and in fixed target experiments. We predict a substantial shrinkage of the diffraction cone from the CERN/FNAL to the HERA range of c.m.s. energyW . TheQ-controlled selectivity to the color(More)