Polarized vector meson production in semi-inclusive DIS

We make a systematic calculation for polarized vector meson production in semi-inclusive lepton-nucleon deep inelastic scattering e(-)N -> e(-)VX. We consider the general case of neutral current electroweak interactions at high energies which give rise to parity-violating effects. We present a general kinematic analysis for the process and show that the cross sections are expressed by 81 structure functions. We further give a parton model calculation for the process and show the results for the structure functions in terms of the transverse momentum dependent parton distribution functions and fragmentation functions at the leading order and leading twist of perturbative quantum chromodynamics. The results show that there are 27 nonzero structure functions at this order, among which 15 are related to the tensor polarization of the vector meson. Thirteen structure functions arc generated by parity-violating effects. We also present the result and a rough numerical estimate for the spin alignment of the vector meson.

Automated summary

In this paper, we systematically calculate the production of polarized vector mesons in semi-inclusive lepton-nucleon deep inelastic scattering. We consider the neutral current electroweak interactions at high energies, which lead to parity-violating effects. The cross sections are expressed by 81 structure functions, and we provide a parton model calculation for the process. The results show that there are 27 nonzero structure functions, with 15 of them related to the tensor polarization of the vector meson.