Determination of flavor asymmetry for $Σ^{\pm}$ by the Drell-Yan process

Details Determination of flavor asymmetry for $Σ^{\pm}$ by the Drell-Yan process Determination of flavor asymmetry for $Σ^{\pm}$ by the Drell-Yan process

1996-09-26

arxiv.org/abs/hep-ph/9609498v1

Phys.Lett.B389:367-373,1996

Physics

High Energy Physics

High Energy Physics - Phenomenology

15 pages, latex. Figures available from alberg@phys.washington.edu. To be published in Phys. Lett. B

Scientific paper

10.1016/S0370-2693(96)01272-5

Flavor asymmetries for the valence and sea quarks of the $\Sigma^{\pm}$ can be obtained from Drell-Yan experiments using charged hyperon beams on proton and deuteron targets. A large, measurable difference in sea quark asymmetries is predicted between SU(3) and pseudoscalar meson models. The latter predict that in $\Sigma^{+}$, $\bar{u}/\bar{d} \leq 1/2$, whereas the former predict $\bar{u}/\bar{d} \approx 4/3$. Estimates of valence quark asymmetries based on quark models also show large deviations from SU(3) predictions, which should be measurable.

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