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- W1991736457 abstract "There are two mechanisms for the generation of an asymmetry between the strange and anti-strange quark distributions in the nucleon: nonperturbative contributions originating from nucleons fluctuating into virtual baryon–meson pairs such as ΛK and ΣK, and perturbative contributions arising from gluons splitting into strange and anti-strange quark pairs. While the nonperturbative contributions are dominant in the large-x region, the perturbative contributions are more significant in the small-x region. We calculate this asymmetry taking into account both nonperturbative and perturbative contributions, thus giving a more accurate evaluation of this asymmetry over the whole domain of x. We find that the perturbative contributions are generally a few times larger in magnitude than the nonperturbative contributions, which suggests that the best region to detect this asymmetry experimentally is in the region 0.02<x<0.03. We find that the asymmetry may have more than one node, which is an effect that should be taken into account, e.g. for parameterizations of the strange and anti-strange quark distributions used in global analysis of parton distributions." @default.
- W1991736457 created "2016-06-24" @default.
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- W1991736457 date "2012-12-01" @default.
- W1991736457 modified "2023-09-25" @default.
- W1991736457 title "Perturbative and nonperturbative contributions to the strange quark asymmetry in the nucleon" @default.
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- W1991736457 doi "https://doi.org/10.1140/epjc/s10052-012-2250-4" @default.
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