Pion Content of the Nucleon as seen in the NA51 Drell-Yan experiment

Abstract

In a recent CERN Drell-Yan experiment the NA51 group found a strong asymmetry of $\bar{u}$ and $\bar{d}$ densities in the proton at $x\simeq 0.18$. We interpret this result as a decisive confirmation of the pion-induced sea in the nucleon.

arXiv comment10 pages + 3 figures, Preprint KFA-IKP(TH)-1994-14 .tex file. After \enddocument a uu-encodeded Postscript file comprising the figures is appended

References in corpus (2)

• Shadowing in deuterium and the small--$x$ limit of $F_2^n/F_2^p$ and $F_2^p-F_2^n$
• Anomalous Evolution of Nonsinglet Nucleon Structure Functions

Cited by in corpus (6)

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• Do the E866 Drell Yan data change our picture of the chiral structure of the nucleon ?
• Nonvanishing tensor polarization of sea quarks in polarized deuterons
• Leading proton spectrum from DIS at HERA
• Determination of flavor asymmetry for ${\Sigma }^{\pm }$ by the Drell-Yan process
• Reggeon and pion contributions in semi-exclusive diffractive processes at HERA