---
author:
- 'Markus Diehl,'
- 'Jonathan R. Gaunt'
- and Kay Schönwald
bibliography:
- 'double.bib'
title: Double hard scattering without double counting
---

We gratefully acknowledge discussions with V. Braun, K. Golec-Biernat, D. Boer, A. Schäfer and F. Tackmann. Special thanks are due to T. Kasemets for valuable remarks on the manuscript. J.G. acknowledges financial support from the European Community under the FP7 Ideas program QWORK (contract 320389). Two of us (M.D. and J.G.) thank the Erwin Schr[ö]{}dinger International Institute for Mathematics and Physics (ESI) for hospitality during the programme “Challenges and Concepts for Field Theory and Applications in the Era of LHC Run-2”, when portions of this work were completed. The Feynman diagrams in this paper were produced with JaxoDraw [@Binosi:2003yf; @Binosi:2008ig].
