Hamburg 2016 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 89: Higgs-Boson (Zerfall in WW/ZZ)

T 89.3: Vortrag

Donnerstag, 3. März 2016, 17:20–17:35, VMP5 HS B1

Studies of the gluon-fusion production of the Higgs boson in the decay channel WW^*→ lvlv using LHC proton-proton data collected at √s = 13 TeV with the ATLAS detector — •Ralf Gugel and Karsten Köneke — Albert-Ludwigs-Universität Freiburg

The single most precise measurement of the production cross section of the Higgs boson was performed using the WW^*→ lvlv decay channel using the full LHC run 1 dataset collected by the ATLAS experiment. Data collected at √s = 13 TeV has the prospect of further increasing the precision of this measurement. However, the signal-to-background cross-section ratios at this new center-of-mass energy change in some cases disfavorably, especially for background processes involving top quarks. Several dedicated background control regions using data allow to reduce uncertainties on the individual background normalizations as well as uncertainties on various experimental efficiencies. Studies of these control regions and background estimates for the signal region derived from the control regions will be shown, as well as sensitivity estimates of the cross-section measurement.