Speaker
Description
We study Z-boson production at the LHC energies within framework of the parton Reggeization approach of high-energy QCD [1,2]. Oppositely the previous calculation [3], based on LO approximation with the partonic process $Q+\bar Q \to Z$, we take into account NLO contribution from the partonic process $Q+R \to q+Z$, where $R$ is the Reggeized gluon and $Q$ is the Reggeized quark. The good agreement with experimental data as for Z-boson pT-spectra as for total cross section was found. The lepton angular coefficients in Z-boson events are studied by the same way, in the LO and in the NLO of the Parton Reggeization approach. The last one is performed in the high-energy factorization in the first time.
[1] M. Nefedov and V. Saleev, Off-shell initial state effects, gauge invariance and angular distributions in the Drell-Yan process, Phys. Lett. B790 (2019), 551-556
[2] M.A. Nefedov, V.A. Saleev and A.V. Shipilova, Dijet azimuthal decorrelations at the LHC in the parton Reggeization approach, Phys. Rev. D87 (2013) no.9, 094030
[3] M.A. Nefedov and V.A. Saleev. High-Energy Factorization for Drell-Yan process in $pp$ and $p{\bar p}$ collisions with new Unintegrated PDFs, Phys. Rev. D102 (2020), 114018
