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.

Systematics of quark/gluon tagging (2017)
Journal Article
Gras, P., Höche, S., Kar, D., Larkoski, A., Lönnblad, L., Plätzer, S., …Thaler, J. (2017). Systematics of quark/gluon tagging. Journal of High Energy Physics, 2017(7), Article 91. https://doi.org/10.1007/jhep07%282017%29091

By measuring the substructure of a jet, one can assign it a “quark” or “gluon” tag. In the eikonal (double-logarithmic) limit, quark/gluon discrimination is determined solely by the color factor of the initiating parton (CF versus CA). In this paper,... Read More about Systematics of quark/gluon tagging.

Parton-shower matching systematics in vector-boson-fusion WW production (2017)
Journal Article
Rauch, M., & Plätzer, S. (2017). Parton-shower matching systematics in vector-boson-fusion WW production. The European Physical Journal C, 77(5), Article 293. https://doi.org/10.1140/epjc/s10052-017-4860-3

We perform a detailed analysis of next-to-leading order plus parton-shower matching in vector-boson-fusion WW production including leptonic decays. The study is performed in the Herwig 7 framework interfaced to VBFNLO 3, using the angular-ordered and... Read More about Parton-shower matching systematics in vector-boson-fusion WW production.

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.

Measurement of observables sensitive to coherence effects in hadronic Z decays with the OPAL detector at LEP (2015)
Journal Article
Fischer, N., Gieseke, S., Kluth, S., Plätzer, S., & Skands, P. (2015). Measurement of observables sensitive to coherence effects in hadronic Z decays with the OPAL detector at LEP. The European Physical Journal C, 75(12), Article 571. https://doi.org/10.1140/epjc/s10052-015-3766-1

A study of QCD coherence is presented based on a sample of about 397,000 e+e− hadronic annihilation events collected at s√=91 GeV with the OPAL detector at LEP. The study is based on four recently proposed observables that are sensitive to coherence... Read More about Measurement of observables sensitive to coherence effects in hadronic Z decays with the OPAL detector at LEP.