The production of lepton pairs at low invariant mass and finite transverse momentum resolves QCD dynamics at the boundary between the perturbative and non-perturbative domains. We investigate the impact of NNLO QCD corrections on these observables at energies corresponding to the BNL RHIC collider and to fixed-target experiments. Satisfactory perturbative convergence is observed in both cases. Only the collider data are found to be well-described by perturbative QCD, thus indicating the importance of non-perturbative effects in lepton-pair transverse momentum distributions at fixed target energies.
@article{arxiv.2110.15839,
title = {Transverse momentum distributions in low-mass Drell-Yan lepton pair production at NNLO QCD},
author = {R. Gauld and A. Gehrmann-De Ridder and T. Gehrmann and E. W. N. Glover and A. Huss and I. Majer and A. Rodriguez Garcia},
journal= {arXiv preprint arXiv:2110.15839},
year = {2022}
}
Comments
v3: Minor corrections in text and figure captions, updated citations; matches published version in PLB