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SUMMARY:Recent advances in the modelling of ttW  at the LHC - Manfred Krau
 s (Florida State University)
DTSTART:20210511T150000Z
DTEND:20210511T160000Z
UID:TALK159166@talks.cam.ac.uk
CONTACT:Heribertus Bayu Hartanto
DESCRIPTION:In the light of recently reported discrepancies between data a
 nd theory for the ttW normalization in either ttH measurements or tttt sea
 rches in the multi-lepton channels the accurate modelling of these complex
  signatures is revisited. I will discuss the current status of the modelli
 ng of the complex ttW signatures with special emphasis on our recent calcu
 lation of top-quark pair production in association with a W boson in the P
 OWHEG-BOX framework. I will show a comparison with other Monte Carlo gener
 ators for the two same-sign lepton signature commonly used by the experime
 nts. Special focus will be put on the assessment of the importance of subl
 eading electroweak contributions in the modelling of the production proces
 s. In addition\, I will discuss theoretical uncertainties of our predictio
 ns\, which are estimated by variations of the renormalization and factoriz
 ation scales\, also matching uncertainties are estimated.
LOCATION:https://cern.zoom.us/j/61144924828?pwd=WDB6QmFCMEZiSEN5Q0k2aklWSj
 k5Zz09
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