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We re-examine the large-x neutron/proton structure function ratio extracted from the latest deuteron data, taking into account the most recent developments in the treatment of Fermi motion, binding and nucleon off-shell effects in the deuteron. Our findings suggest that as x → 1 the ratio of the neutron to proton structure functions (F n2 F p2 ) is consistent with the perturbative...
Pion sea quark distributions are relatively poorly determined. We show that combinations of π + and π - Drell-Yan measurements on deuterium allow the pion sea distribution to be extracted. The contribution from the sea of the pion is comparable with that from its valence quarks and hence the experiment should be quite sensitive to the fraction of the pion momentum carried by the...
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