Universality in W+Multijet Production
  We study $W$-boson production accompanied by multiple jets at 7 TeV at the LHC. We study the jet-production ratio, of total cross sections for $W$+$n$- to $W$+($n-1$)-jet production, and the ratio of distributions in the total transverse hadronic jet energy $H_{\rm T}^{\rm jets}$. We use the ratios to extrapolate the total cross section, and the differential distribution in $H_{\rm T}^{\rm jets}$, to $W$+6-jet production. We use the BlackHat software library in conjunction with SHERPA to perform the computations. 
Z. Bern, L. J. Dixon, F. Febres Cordero, S. Hoeche, H. Ita, D. A.   Kosower, D. Maitre, K. J. Ozeren
hep-ph