Ds+ -- Ds- Asymmetry in Photoproduction

Details Ds+ -- Ds- Asymmetry in Photoproduction Ds+ -- Ds- Asymmetry in Photoproduction

2005-04-12

arxiv.org/abs/hep-ph/0504087v2

Phys.Lett.B621:139-144,2005

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 page, 5 figures

Scientific paper

10.1016/j.physletb.2005.06.057

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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