A Study Of Lepton-Nucleon Deep Inelastic Scattering

In this paper,the vector meson generation process from lepton-nucleon scattering to polarization is selected.We carry out kinematic analysis of this process,taking into account the effects of electromagnetic interaction,weak interaction and weak electric interference.The cross section can be written as a lepton Zhang The reduced form of the quantity and hadron tensors.The results show that the cross section can be represented by 81 structure functions when considering the generated final state vector meson polarization,of which 42 correspond to space reflection as even,and the rest correspond to space reflection as odd.Further,we use quantum chromodynamics to calculate the partial sub-model of the process at the leading twist.The results show that the corresponding structure function can be expressed by the partial sub-distribution function and fragmentation function dependent on the transverse momentum.There are 18 combinations,half of which It is related to the partial sub-distribution function and fragmentation function of odd chirality.Finally,the general form of the cross section is obtained by condensing the hadron tensor and the lepton tensor.According to the partial sub-model of the structure function obtained by calculation,we found that there are 27 non-zero structure functions in the leading twist,and analyzed the structure functions related to the polarization of the vector meson tensor and the structure functions due to parity breakage.In addition,we also take the generation of K*0 vector mesons as an example,and use the parameterization results of the existing partial distribution function and the parameterization results of the fragmentation function related to tensor polarization to determine its self-Numerical calculation of the spin alignment shows that the spin alignment deviates significantly from 1/3.