Power corrections to the differential Drell-Yan cross section
Abstract
We estimate the power corrections (infrared renormalon contributions) to the coefficient functions for the differential Drell-Yan cross-section
d
2
σ/d
Q
2
dy
, where
Q
2
is the mass squared and
y
the rapidity of the produced lepton pair. We employ the dispersive method based on the analysis of one-loop Feynman graphs containing a massive gluon.