https://doi.org/10.1140/epjc/s10052-020-7901-2
Regular Article - Theoretical Physics
Improving the Drell–Yan probe of small x partons at the LHC via an azimuthal angle cut
Departamento de Física, CFM, Universidade Federal de Santa Catarina, C.P. 476, Florianópolis, SC, CEP 88.040-900, Brazil
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Received:
19
February
2020
Accepted:
1
April
2020
Published online:
18
April
2020
Abstract
Predictions for Drell–Yan lepton pair production at low dilepton mass and small x at the LHC usually have a large scale dependence. This can be decreased by determining an optimal factorization scale. In this paper, we reduce this scale by imposing a cutoff in azimuthal angle between the transverse momentum of the leptons, properly taking into account Sudakov effects. This allows one to probe the parton distributions at smaller scales eliminating most of the current theoretical uncertainty.
© The Author(s), 2020
