Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2007-03-13
Eur.Phys.J.C50:603-608,2007
Physics
High Energy Physics
High Energy Physics - Phenomenology
6 latex pages, 1 figure, to appear in EPJC
Scientific paper
10.1140/epjc/s10052-007-0227-5
The asymmetry of $D^-$ and $D^+$ meson production in $\pi^-N$ scattering observed by the E791 experiment is a typical phenomenon known as the leading particle effect in charm hadroproducton. We show that the phenomenon can be explained by the effect of light quark fragmentation into charmed hadrons (LQF). Meanwhile, the size of the LQF effect is estimated from data of the E791 experiment. A comparison is made with the estimate of the LQF effect from prompt like-sign dimuon rate in neutrino experiments. The influence of the LQF effect on the measurement of nucleon strange distribution asymmetry from charged current charm production processes is briefly discussed.
Gao Puze
Ma Bo-Qiang
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