Abstract

The analytical expressions of the mixed QCD-EW corrections to on-shell Z boson inclusive production cross section at hadron colliders are presented, together with computational details. The results are given in terms of polylogarithmic functions and elliptic integrals. The impact on the prediction of the Z boson production total cross section is discussed, comparing different proton parton density sets.

Highlights

  • The Z boson production cross sectionWe discuss the theoretical framework, providing the details of perturbative contributions from various partonic channels which constitute the mixed QCD-EW corrections to the inclusive production cross section of the Z boson at hadron colliders

  • The production of an on-shell Z boson represents an approximation of the full neutralcurrent (NC) DY process, in that special kinematical configuration dominated by the Z-boson resonance

  • The theoretical uncertainty associated with missing higher-order EW corrections is formally at the next-to-next-to-leading order (NNLO)-EW level and it is significantly reduced compared to the leading order (LO) case

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Summary

The Z boson production cross section

We discuss the theoretical framework, providing the details of perturbative contributions from various partonic channels which constitute the mixed QCD-EW corrections to the inclusive production cross section of the Z boson at hadron colliders. We discuss here the necessary steps to perform ultraviolet (UV) renormalisation and mass factorisation

The hadron-level cross section
The partonic subprocesses
Classification of the radiative corrections
Ultraviolet renormalisation
Infrared singularities and mass factorisation
Computational details
General strategy
Evaluation of the full set of master integrals
Example: a subsystem of two real-virtual master integrals
Solving the master integrals with elliptic kernels
Analytical results
The partonic coefficients for QED
The partonic coefficients for Z
The partonic coefficients for W
Checks
Phenomenology
Findings
Conclusions

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