TITLE

Discriminating between chiral models of the nucleon via hard semi-inclusive evector Nvector and Nvector Nvector scattering

AUTHOR(S)
Dressler, B.; Goeke, K.; Polyakov, M. V.; Schweitzer, P.; Strikman, M.; Weiss, C.
PUB. DATE
March 2000
SOURCE
AIP Conference Proceedings;2000, Vol. 508 Issue 1, p23
SOURCE TYPE
Conference Proceeding
DOC. TYPE
Article
ABSTRACT
Measurements of the flavor asymmetry of the polarized antiquark distributions in the nucleon, Δu¯(x)-Δd¯(x), would provide a unique opportunity to discriminate between different models of the role of the chiral structure of the nucleon in deep-inelastic scattering. In the pion cloud model of the nucleon’s sea quark distributions the polarized flavor asymmetry is zero, while the large-N[sub c] picture of the nucleon as a chiral soliton predicts large polarized flavor asymmetries. We discuss the prospects for measuring the polarized antiquark flavor asymmetries in two types of semi-inclusive scattering experiments: i) Hadron production in semi-inclusive polarized eN scattering (SMC, HERMES); ii) Drell-Yan lepton pair production in polarized NN scattering at HERA or RHIC energies. In particular, the Drell-Yan spin asymmetries are shown to be remarkably sensitive to Δu¯(x)-Δd¯(x). © 2000 American Institute of Physics.
ACCESSION #
6028941

 

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