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Recent advances in the modelling of ttW at the LHC

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If you have a question about this talk, please contact Heribertus Bayu Hartanto.

In the light of recently reported discrepancies between data and theory for the ttW normalization in either ttH measurements or tttt searches in the multi-lepton channels the accurate modelling of these complex signatures is revisited. I will discuss the current status of the modelling of the complex ttW signatures with special emphasis on our recent calculation of top-quark pair production in association with a W boson in the POWHEG -BOX framework. I will show a comparison with other Monte Carlo generators for the two same-sign lepton signature commonly used by the experiments. Special focus will be put on the assessment of the importance of subleading electroweak contributions in the modelling of the production process. In addition, I will discuss theoretical uncertainties of our predictions, which are estimated by variations of the renormalization and factorization scales, also matching uncertainties are estimated.

This talk is part of the Cavendish HEP Seminars series.

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