55,294 research outputs found
Flavor Asymmetry of the Nucleon Sea
Recent deep inelastic scattering and Drell-Yan experiments have revealed a
surprisingly large asymmetry between the up and down sea quark distributions in
the nucleon. The current status of the flavor asymmetry of the nucleon sea is
reviewed. Implications of various theoretical models and possible future
measurements are also discussed.Comment: 9 pages, 3 figures. Invited paper presented at the "16th
International Conference on Few-Body Problem in Physics" March 200
Dilepton Production at Fermilab and RHIC
Some recent results from several fixed-target dimuon production experiments
at Fermilab are presented. In particular, we discuss the use of Drell-Yan data
to determine the flavor structure of the nucleon sea, as well as to deduce the
energy-loss of partons traversing nuclear medium. Future dilepton experiments
at RHIC could shed more light on the flavor asymmetry and possible
charge-symmetry-violation of the nucleon sea. Clear evidence for scaling
violation in the Drell-Yan process could also be revealed at RHIC.Comment: 5 pages, talk presented at the RIKEN-BNL Workshop on 'Hard Parton
Physics in Nucleus-Nucleus collisions, March 199
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