Strange / anti-strange asymmetry in the nucleon sea

Details Strange / anti-strange asymmetry in the nucleon sea Strange / anti-strange asymmetry in the nucleon sea

1998-01-13

arxiv.org/abs/hep-ph/9801283v2

Phys.Lett. B445 (1998) 8-13

Physics

High Energy Physics

High Energy Physics - Phenomenology

Modified version, several improvements. To appear in Phys. Lett. B

Scientific paper

10.1016/S0370-2693(98)01460-9

We analyze the non-perturbative structure of the strange sea of the nucleon within a meson cloud picture. In a low $Q^2$ approach in which the nucleon is viewed as a three valon bound state, we evaluate the probability distribution of an in-nucleon Kaon-Hyperon pair in terms of splitting functions and recombination. The resulting kaon and hyperon probability densities are convoluted with suitable strange distributions inside the meson and baryon in order to obtain non-perturbative contributions to the strange sea of the nucleon. We find a structured strange/anti-strange asymmetry, displaying a clear excess of quarks (anti-quarks) for large (small) momentum fractions

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