Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
HK: Physik der Hadronen und Kerne
HK 38: Elektromagnetische und hadronische Proben VI
HK 38.1: Vortrag
Donnerstag, 20. März 2003, 13:30–13:45, B
Nuclear partons in the saturation regime — •Wolfgang Schäfer1, Nikolai N. Nikolaev1,2, Igor P. Ivanov3, Bronislav G. Zakharov2 und Vladimir R. Zoller4 — 1Institut für Kernphysik, FZ Jülich — 2L.D. Landau Institut, Chernogolovka, Rußland — 3Institut f. Mathematik, Novosibirsk, Rußland — 4ITEP, Moskau, Rußland
We discuss the impact of intranuclear distortions on various hard processes on nuclei, and present a novel formalism for the calculation of two-body (di-jet) transverse momentum spectra in terms of multi-parton color dipole cross sections. We derive a multiple scattering expansion for the jet-jet inclusive cross section and discuss the azimuthal decorrelation of hard jets produced in deep inelastic scattering off nuclei. We show that for hard jets the decorrelation (acoplanarity) momentum is of the order of the nuclear saturation momentum QA. For minijets with the transverse momentum below the saturation scale we predict a cmplete disappearance of the jet-jet correlation. Special attention is paid to the non-Abelian aspects of the propagation of color dipoles in a nuclear medium. We comment on a possible relevance of the decorrelation of jets to the experimental data from the STAR-RHIC Collaboration. For the one-particle inclusive spectrum we derive a two-plateau momentum distribution of final state (FS) quarks produced in deep inelastic scattering (DIS) off nuclei in the saturation regime.