W + W + plus dijet production in the POWHEG BOX Tom Melia, Paolo Nason, Raoul Rontsch and Giulia Zanderighi Eur. Phys. J. C, 71 6 (2011) 1670 Published online: 09 June 2011 DOI: 10.1140/epjc/s10052-011-1670-x