https://doi.org/10.1140/epjc/s10052-008-0733-0
Regular Article - Theoretical Physics
The influence of direct D-meson production on the determination of the nucleon strangeness asymmetry via dimuon events in neutrino experiments
1
Kavli Institute for Theoretical Physics China and Institute of Theoretical Physics, CAS, Beijing, 100190, China
2
Institute of High Energy Physics and Theoretical Physics Center for Science Facilities, CAS, Beijing, 100049, China
3
School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing, 100871, China
* e-mail: mabq@phy.pku.edu.cn
Received:
23
May
2008
Revised:
15
August
2008
Published online:
24
September
2008
Experimentally, the production of oppositely charged dimuon events by neutrino and antineutrino deep inelastic scattering (DIS) is used to determine the strangeness asymmetry inside a nucleon. Here we point out that the direct production of a D-meson in DIS may have a substantial influence on the measurement of nucleon strangeness distributions. Direct D-meson production is via heavy quark recombination (HQR) and via 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 a stronger effect than LQF-P does, and the former may influence the experimental determination of the nucleon strangeness asymmetry.
© Springer-Verlag , 2008
