The flavour asymmetry and quark-antiquark asymmetry in the $Σ^+$-sea

Details The flavour asymmetry and quark-antiquark asymmetry in the $Σ^+$-sea The flavour asymmetry and quark-antiquark asymmetry in the $Σ^+$-sea

1999-07-30

arxiv.org/abs/hep-ph/9907560v3

Phys.Lett. B474 (2000) 138-144

Physics

High Energy Physics

High Energy Physics - Phenomenology

RevTex, 12 pages, 4 Postscript figures. The effects from the input parton distribution evolution are discussed. Conclusions re

Scientific paper

10.1016/S0370-2693(99)01509-9

The sea quark content of the $\Sigma^+$ baryon is investigated using light-cone baryon-meson fluctuation model suggested by Brodsky and Ma. It is found that the $\Sigma^+$ sea is flavour asymmetric ($\dbar > \ubar > \sbar$) and quark-antiquark asymmetric ($q \not= \qbar$). Our prediction for the flavour asymmetry, $\dbar > \ubar > \sbar$, is significantly different from the SU(3) prediction ($\dbar < \ubar < \sbar$), while our prediction for the $d$-$\dbar$ asymmetry is consistent with the SU(3) prediction.

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