A comprehensive analysis of Drell-Yan production uncertainties and mass effects at moderate and low dilepton masses
Abstract
We present a thorough investigation of the sources of uncertainties to the Drell-Yan production using state-of-the-art predictions for both neutral and charged current channels, focusing on the low invariant mass region. Differential predictions for the invariant mass spectrum are provided at N3LO supplemented with exact charm and bottom quark mass effects calculated at O(αs2). The impact of PDF choices (including approximate N3LO), scale variations, the variation of the strong coupling constant, and impact heavy quark mass effects on the distributions is studied in detail. We also comment on the correlation of high-energy astrophysical processes with the low-mass DY region.
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