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Ds+ -- Ds- Asymmetry in Photoproduction

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arxiv hep-ph/0504087 v2 pith:GURNF5UH submitted 2005-04-12 hep-ph

Ds+ -- Ds- Asymmetry in Photoproduction

classification hep-ph
keywords asymmetryquarkstrangedistributiondistributionsmodelmodelsphotoproduction
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Considering of the possible difference in strange and antistrange quark distributions inside nucleon, we investigate the Ds+ -- Ds- asymmetry in photoproduction in the framework of heavy-quark recombination mechanism. We adopt two distribution models of strange sea, those are the light-cone meson-baryon fluctuation model and the effective chiral quark model. Our results show that the asymmetry induced by the strange quark distributions is distinct, which is measurable in experiments. And, there are evident differences between the predictions of our calculation and previous estimation. Therefore, the experimental measurements on the Ds+ -- Ds- asymmetry may impose a unique restriction on the strange-antistrange distribution asymmetry models.

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