Speaker
Description
SeaQuest has measured dimuon events from the interaction of 120 GeV proton beam on liquid hydrogen and deuterium targets with dimuon mass between 2 and 8 GeV. These dimuon events contain both the Drell-Yan process and the charmonium ($J/\psi$ and $\psi^\prime$) production. Unlike the Drell-Yan process which probes the antiquark distributions in the nucleons, the charmonium production is sensitive to both quark and gluon distributions. SeaQuest has extracted the (p+d)/(p+p) cross section ratios as well as the differential cross sections for charmonium production in the kinematic region of 0.4 < $x_F$ < 0.9. The (p+d)/(p+p) cross section ratios for charmonium production are found to be significantly different from that of the Drell-Yan process. The measured differential cross sections for charmonium production are compared with theoretical model calculations. The beam energy dependence of the charmonium production cross sections will also be presented.
| Submitted on behalf of a Collaboration? | Yes |
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