The quark recombination mechanism is proposed to explain the asymmetry between production rates of D+ and of D− in their inclusive productions, and also asymmetries for other charmed hadrons. These asymmetries are observed in experiment and are called as leading particle effects. In this work we give a general analysis for contributions of quark recombination to these asymmetries. The contribut...

We perform an analysis of the quark angular momentum in a light-cone representation by taking into account the effect due to the Melosh-Wigner rotation and find that there is a relativistic correction factor connecting the quark orbital angular momentum with the quark model spin distribution: Lq(x) = < ML(x) >∆qQM(x). The quark orbital angular momentum Lq(x) and the quark helicity distribution ...

This article is devoted to the processes with participation of t-quark. The top quarks are one most amazing elementary particles. Predictions characteristics various interactions involving -quark have high theoretical accuracy, as well has large production cross section which makes it a unique laboratory for testing Standard Model and beyond. quark important objects in searches new effects. rev...