@article{c08daf5f-1684-4f6b-85f2-84210f16ce3b,
  abstract     = {{<p>Efficient generation of LHC events is hindered by the rapidly rising cost of evaluating QCD matrix elements with increasing multiplicity. We build on a recently proposed two-step strategy in which unweighted events are first generated using the leading-colour (LC) approximation and then reweighted to full-colour (FC) accuracy, utilising the LC integration efficiency while recovering the exact FC prediction. In this work we extend the method to general Standard Model processes and present AmpliCol, a standalone implementation designed for LHC collisions. We benchmark multi-jet, tt¯+jets, ZZ+jets, and Drell-Yan+jets production, measuring the time required to obtain a fixed number of unweighted events at FC accuracy. Across all processes, the runtime exhibits a stable exponential scaling with multiplicity, far milder than the factorial growth of conventional matrix-element generators. This demonstrates that the AmpliCol code enables efficient event generation at multiplicities that are otherwise computationally prohibitive.</p>}},
  author       = {{Frederix, Rikkert and Vitos, Timea}},
  issn         = {{1029-8479}},
  keywords     = {{Automation; Specific QCD Phenomenology}},
  language     = {{eng}},
  number       = {{4}},
  publisher    = {{Springer}},
  series       = {{Journal of High Energy Physics}},
  title        = {{Event generation with exponential scaling in multiplicity using AmpliCol}},
  url          = {{http://dx.doi.org/10.1007/JHEP04(2026)192}},
  doi          = {{10.1007/JHEP04(2026)192}},
  volume       = {{2026}},
  year         = {{2026}},
}