Würzburg 2018 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 33: Higgs II
T 33.2: Vortrag
Dienstag, 20. März 2018, 16:45–17:00, Z6 - HS 0.004
Modelling of the W+jets background in the 1-lepton channel for the VH, H → bb analysis — •Simona Gargiulo and Christian Weiser — Albert-Ludwigs-Universität Freiburg
The search for the decay of the Standard Model Higgs boson into a bb pair produced in association with a W or Z boson with the Atlas detector is presented. The analysed dataset corresponds to an integrated luminosity of 36.1 fb−1 collected in proton-proton collisions in Run 2 of the Large Hadron Collider at a centre-of-mass energy of 13 TeV. Final states containing zero, one and two charged leptons are considered targeting the decay channels Z → νν, W → lν and Z → l l.
The overall systematic uncertainty has significant contributions from the ones on the dominating background processes tt and W+jets. The focus of this talk will be on the estimation of the systematic uncertainties on the theoretical prediction of W+jets background in the 1-lepton channel. This estimation relies on the comparison of two different generators and on studies of their variations due to different parameters settings.
New developments allowing to use generators based studies more efficiently in the context of the analysis will also be discussed.