Abstract
We study the production of c c pairs and dimuons from hard collisions in nuclear reactions within the covariant transport approach HSD, which describes successfully both hadronic and electromagnetic observables from p + A and A + A collisions from SIIS to SPS energies. The production of c c and Drell-Yan pairs is treated perturbatively employing experimental cross sections while the interactions of c c pairs with hadrons are included by conventional cascade-type two-body collisions. Adopting 6 mb for the c c- baryon cross sections the data on J ψ suppression in p + A reactions are reproduced in line with calculations based on the Glauber model. We study different models for c c dissociation on mesons in comparison with the experimental data of the HELIOS-3, NA38 and NA50 collaborations. Adopting absorption cross sections with mesons above the D D threshold in the order of 1.5–3 mb we find that all data on J ψ suppression from both proton-nucleus and nucleus-nucleus collisions can be described without assuming the formation of a quark-gluon plasma in these collisions.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
