Parton-shower matching for electroweak corrections

• Applicant: Dr. Alexander Mück
• Subject Area: Nuclear and Elementary Particle Physics, Quantum Mechanics, Relativity, Fields
• Term: from 2015 to 2017
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 280364565

The project improves predictions for important standard-model processes at the LHC. It provides electroweak corrections at the next-to-leading order (NLO) in the perturbative expansion which can be consistently combined with a parton shower including photon emission, i.e. we provide the so-called parton-shower matching for electroweak corrections. The matching procedure is applied to the production of weak vector bosons in association with a jet at the LHC. W+jet and Z+jet production are being measured at unprecedented accuracy at the LHC experiments such that the processes are standard candles for LHC physics. In addition to elaborated efforts in QCD, at this level of precision, it is mandatory to include electroweak corrections. The parton-shower matching combines the NLO accuracy with respect to QCD and electroweak corrections for inclusive observables with the resummation of leading logarithms by the parton shower. Moreover, it provides results with electroweak corrections in terms of unweighted events which can be readily used in experimental analysis.

• DFG Programme: Research Grants
• Co-Investigator: Professor Dr. Michael Krämer