21 research outputs found
On next-to-leading power threshold corrections in Drell-Yan production at (NLO)-L-3
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
at NLO, 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. They are also
interesting in their own right, given that they constitute a previously unknown
contribution to the Drell-Yan cross-section at .Comment: 41 pages, 4 figure