Comparison of kaon and pion valence quark distributions in a statistical model

Details Comparison of kaon and pion valence quark distributions in a statistical model Comparison of kaon and pion valence quark distributions in a statistical model

2011-10-07

arxiv.org/abs/1110.1606v1

Physics

Nuclear Physics

Nuclear Theory

11 pages, 5 figures

Scientific paper

We have calculated the Bjorken-x dependence of the kaon and pion valence quark distributions in a statistical model. Each meson is described by a Fock state expansion in terms of quarks, antiquarks and gluons. Although Drell-Yan experiments have measured the pion valence quark distributions directly, the kaon valence quark distributions have only been deduced from the measurement of the ratio $\bar{u}_K(x)/\bar{u}_\pi(x)$. We show that, using no free parameters, our model predicts the decrease of this ratio with increasing x.

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