Mathieu Pellen: Top quark at the LHC: NLO corrections and off-shell effects
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Europe/Berlin
seminar room 2 (building 2A)
seminar room 2
building 2A
Description
Abstract: With Run II, the Large Hadron Collider (LHC) is entering the precision era. In order to match the experimental measurements, precise and appropriate theoretical predictions should be computed. In that respect, the assessment of QCD corrections, electroweak (EW) corrections, and off-shell effects for Standard Model (SM) processes is of prime importance. EW corrections can grow large in particular phase space regions which are usually the one where new physics is expected to appear. This makes them particularly relevant for precise SM measurements as well as for SM background estimate in new physics searches. In addition to allow for a direct comparison with experiments, off-shell computations provide realistic estimate of the high energy tail of distributions. The latter will be probed during Run II thanks to a never accessed centre-of-mass energy. To illustrate this, I present three recent computations where NLO QCD and EW corrections have been calculated for processes involving off-shell top quarks: the production of top-quark pairs decaying semi leptonically or fully leptonically and the latter production process in association with a Higgs Boson. In these three examples, I discuss the impact of NLO corrections and off-shell effects.
