The flavor asymmetry of polarized anti-quarks in the nucleon

We present a study of the flavor asymmetry of polarized anti-quarks in the nucleon using the meson cloud model. We include contributions both from the vector mesons and the interference terms of pseudoscalar and vector mesons. Employing the bag model, we first give the polarized valence quark distri...

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Bibliographic Details
Published in:The European physical journal. C, Particles and fields Particles and fields, 2001-06, Vol.21 (1), p.105-114
Main Authors: Cao, F.-G., Signal, A.I.
Format: Article
Language:English
Subjects:
Asymmetry
Flavors
Interference
Nucleons
Quarks
Vector mesons
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Summary:We present a study of the flavor asymmetry of polarized anti-quarks in the nucleon using the meson cloud model. We include contributions both from the vector mesons and the interference terms of pseudoscalar and vector mesons. Employing the bag model, we first give the polarized valence quark distribution of the \(\rho\) meson and the interference distributions. Our calculations show that the interference effect mildly increases the prediction for \(\Delta{\bar d}(x)- \Delta{\bar u}(x)\) at intermediate x region. We also discuss the contribution of “Pauli blocking” to the asymmetry.
ISSN:1434-6044
1434-6052
DOI:10.1007/s100520100726