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Merging NLO multi-jet calculations with improved unitarization (2018)
Journal Article
Bellm, J., Gieseke, S., & Plätzer, S. (2018). Merging NLO multi-jet calculations with improved unitarization. The European Physical Journal C, 78(3), Article 244. https://doi.org/10.1140/epjc/s10052-018-5723-2

We present an algorithm to combine multiple matrix elements at LO and NLO with a parton shower. We build on the unitarized merging paradigm. The inclusion of higher orders and multiplicities reduce the scale uncertainties for observables sensitive to... Read More about Merging NLO multi-jet calculations with improved unitarization.

Parton-shower uncertainties with Herwig 7: benchmarks at leading order (2016)
Journal Article
Bellm, J., Nail, G., Plätzer, S., Schichtel, P., & Siódmok, A. (2016). Parton-shower uncertainties with Herwig 7: benchmarks at leading order. The European Physical Journal C, 76(12), Article 665. https://doi.org/10.1140/epjc/s10052-016-4506-x

We perform a detailed study of the sources of perturbative uncertainty in parton-shower predictions within the Herwig 7 event generator. We benchmark two rather different parton-shower algorithms, based on angular-ordered and dipole-type evolution, a... Read More about Parton-shower uncertainties with Herwig 7: benchmarks at leading order.

Anomalous coupling, top-mass and parton-shower effects in W + W − production (2016)
Journal Article
Bellm, J., Gieseke, S., Greiner, N., Heinrich, G., Plätzer, S., Reuschle, C., & von Soden-Fraunhofen, J. (2016). Anomalous coupling, top-mass and parton-shower effects in W + W − production. Journal of High Energy Physics, 2016(5), Article 106. https://doi.org/10.1007/jhep05%282016%29106

We calculate the process pp → W+W− → e+νeµ−¯ νµ at NLO QCD, including also effective field theory (EFT) operators mediating the ggW+W− interaction, which first occur at dimension eight. We further combine the NLO and EFT matrix elements produced by GoSa... Read More about Anomalous coupling, top-mass and parton-shower effects in W + W − production.