2018

On next-to-leading power threshold corrections in Drell-Yan production at N$^3$LO

Bahjat-Abbas, Nadia, Damsté, J. Sinninghe, Vernazza, Leonardo et al.

Understand

The cross-section for Drell-Yan production of a vector boson has been previously calculated at next-to-next-to-leading order, supplemented by enhanced logarithmic terms associated with the threshold region.

  • In this paper, we calculate a large set of enhanced terms associated with the colour structure $C_F^3$ at N$^3$LO, for the double real emission contribution in the quark-antiquark channel, as an expansion around the threshold region up to and including the first subleading power.
  • We perform our calculation using the method of regions, which systematically characterises all contributions according to whether the virtual gluon is (next-to) soft, collinear or hard in nature.
  • Our results will prove useful for developing general formalisms for classifying next-to-leading power (NLP) threshold effects.

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