Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..apru15001t&link_type=abstract
American Physical Society, April Meeting, Jointly Sponsored with the High Energy Astrophysics Division (HEAD) of the American As
Astronomy and Astrophysics
Astrophysics
Scientific paper
Recently Fermilab has approved experiment 906 which will extend the measurement of the anti-quark asymmetry in the nucleon sea to larger values of the fractional momentum (x). This measurement using proton induced Drell-Yan reactions at 120 GeV will extend beyond the measurement made by FNAL E866/NuSea. E866 unexpectedly showed that the ratio of the anti-down to anti-up quark distributions varied considerably with x. A lower energy primary proton beam from the Fermilab Main Injector makes it possible to extend the E866 measurements to larger x with much higher precision. This experiment will also measure parton energy loss and modifications to the anti-quark distributions in nuclear targets at large x (x>0.2).
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