$D_s$ Asymmetry in Photoproduction

Details $D_s$ Asymmetry in Photoproduction $D_s$ Asymmetry in Photoproduction

2005-09-27

arxiv.org/abs/hep-ph/0509303v1

Int.J.Mod.Phys.A21:893-896,2006

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, talk presented by I. Caprini at the International Conference on QCD and Hadronic Physics, June 16-20 2005, Beijing

Scientific paper

10.1142/S0217751X06032253

By adopting two models of strange and antistrange quark distributions inside nucleon, the light-cone meson-baryon fluctuation model and the effective chiral quark model, we calculate the $D_s^+ - D_s^-$ asymmetry in photoproduction in the framework of heavy-quark recombination mechanism. We find that the effect of asymmetry of strange sea to the $D_s$ asymmetry is considerable and depending on the different models. Therefore, we expect that with the further study in electroproduction, e.g. at HERA and CEBAF, the experimental measurements on the $D_s^+ - D_s^-$ asymmetry may impose a strong restriction on the strange-antistrange distribution asymmetry models.

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