tt pair hadroproduction in association with a heavy boson at the NLO QCD accuracy + Parton Shower

Garzelli, M. V. and Kardos, Ádám and Papadopoulos, C. G. and Trócsányi, Zoltán (2013) tt pair hadroproduction in association with a heavy boson at the NLO QCD accuracy + Parton Shower. JOURNAL OF PHYSICS-CONFERENCE SERIES, 452 (1). ISSN 1742-6588

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Abstract

The PowHel framework allows to make predictions of total and differential cross- sections of multiparticle hadroproduction processes at both NLO QCD accuracy and NLO QCD matched to Parton Shower, on the basis of the interface between the POWHEG-BOX and HELAC-NLO codes. It has already been applied to study several processes involving a t¯t pair in association with a third particle or hadronic jet. Our most recent predictions concern t¯tV hadroproduction (with V = W or Z), at both parton and hadron level, by considering different decay channels (hadronic and leptonic) of the heavy particles. In particular, we show the results of our phenomenological analyses under the same system of cuts also recently adopted by the CMS collaboration at LHC.

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