---
author:
- 'Markus Diehl,'
- 'Jonathan R. Gaunt,'
- Daniel Ostermeier
- 'Peter Plö[ß]{}l'
- and Andreas Schäfer
bibliography:
- 'factdDY.bib'
title: 'Cancellation of Glauber gluon exchange in the double Drell-Yan process'
---

We are indebted to John Collins for numerous helpful discussions. Thanks go to Maarten Buffing and Tomas Kasemets for their careful reading of the manuscript. Some of the calculations for this work were done with FORM [@Kuipers:2012rf], and the figures were produced with JaxoDraw [@Binosi:2003yf]. We acknowledge support by BMBF (grants 05P12WRFTE and 05P15WRCAA). J.G. acknowledges financial support from the European Community under the “Ideas” program QWORK (contract 320389).
