核子中奇异夸克分布不对称性与轻味夸克碎裂效应

核子中奇异－反奇异夸克分布的不对称性是核子结构研究中的重要非微扰效应, 然而至今未被实验所直接检验.为了探讨测量这种奇异分布不对称性的有效方法,考察了轻味夸克碎裂效应对测量奇异分布不对称性的影响.建议通过直接测量高能中微子和反中微子的带电流深度非弹散射中的带电和中性D介子的微分截面来测量奇异分布的不对称性.这种方法能够使奇异分布不对称性与轻味夸克碎裂的效应相分离.

Nucleon Strange Asymmetry and the Light Quark Fragmentation Effect

Nucleon strange asymmetry is an important non-perturbative effect in the study of nucleon structure, but it has not been checked by experiments yet. For effectively measuring the nucleon strange asymmetry, we investigate the light quark fragmentation effect that may affect the measurement of the strange asymmetry. We suggest an inclusive measurement of charged and neutral charmed hadrons by using an emulsion target in the neutrino and antineutrino induced charged current deep inelastic scattering, in which the strange asymmetry effect and the light quark fragmentation effect can be separated.