TY  - INPR
A1  - Gerland, Lars
A1  - Frankfurt, Leonid
A1  - Strikman, Mark
A1  - Stöcker, Horst
A1  - Greiner, Walter
T1  - Charmonium suppression : interplay of hadronic and partonic degrees of freedom
N2  - Last year the E866-group of the Fermilab measured the xF dependence of J/Psi and 2 suppression in pA collisions. We discuss two of the effects found in that experiment with regard to color coherence effects: the di erent suppression of the J/Psi and the 2 at xF < 0 and the significant suppression of both at large xF . The small xF regions is dominated by fully formed charmonium states and thus enables us to discuss the formation time and the cross section of the different charmonium states. In the large xF region the interaction of the charmonium states with nuclear matter has to be described by partonic degrees of freedom, because in that kinematic domain the formation time is much larger than the nuclear radii. The understanding of this region will be crucial for the interpretation of the data of the future heavy ion colliders RHIC and LHC.
KW  - partonic
KW  - Freiheitsgrade
KW  - hadronic
KW  - Zusammenstoß
KW  - partonic
KW  - degrees of freedom
KW  - hadronic
KW  - collision
Y1  - 1999
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/3144
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30-22554
ER  -