Subject: Title and abstract for Eric Hawker's Talk on Tue Aug 18th
Date: Mon, 3 Aug 1998 09:59:08 -0700 (PDT)
From: Brad Abbott <bkabbott@adonis.lbl.gov>
To: mkihanya@lbl.gov

Hi Mary,

Here is Eric Hawker's Title and Abstract

     My talk will be titled "Measurement of the Flavor Asymmetry in the
Nucleon Sea".

Abstract

     Fermilab experiment E866 has reported a precise measurement of the
ratio of Drell-Yan yields from an 800 GeV/c proton beam incident on
hydrogen and deuterium targets. From this ratio of yields the asymmetry
between anti-down and anti-up quark distributions in the nucleon was
determined over a wide range in Bjorken-x. The x dependence of the ratio
of anti-down to anti-up quarks shows a substantial excess of anti-down
quarks for x<0.25. For x>0.25 this ratio of anti-quark distributions
appears to be much closer to unity. Predictions made by current nucleon
structure parametrizations and several theoretical nonperturbative QCD
models will be compared to the E866 results.