Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2008-08-26
Eur.Phys.J.C58:37-46,2008
Physics
High Energy Physics
High Energy Physics - Phenomenology
9 latex pages, 7 figures
Scientific paper
10.1140/epjc/s10052-008-0733-0
Experimentally, the production of oppositely charged dimuon events by neutrino and anti-neutrino deep inelastic scattering (DIS) is used to determine the strangeness asymmetry inside a nucleon. Here we point out that the direct production of $D$-meson in DIS may make substantial influence to the measurement of nucleon strange distributions. The direct $D$-meson production is via the heavy quark recombination (HQR) and via the light quark fragmentation from perturbative QCD (LQF-P). To see the influence precisely, we compute the direct $D$-meson productions via HQR and LQF-P quantitatively and estimate their corrections to the analysis of the strangeness asymmetry. The results show that HQR has stronger effect than LQF-P does, and the former may influence the experimental determination of the nucleon strangeness asymmetry.
Gao Puze
Ma Bo-Qiang
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