Würzburg 2018 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 57: Higgs III
T 57.6: Vortrag
Mittwoch, 21. März 2018, 17:45–18:00, Z6 - HS 0.004
Test of CP Invariance in vector-boson fusion production of the Higgs boson using the Optimal Observable method in the decay H → τlτh with the ATLAS detector at √s = 13 TeV — Elias Coniavitis, •Dirk Sammel, and Markus Schumacher — Albert-Ludwigs-Universität Freiburg
C and CP violation are one of the three Sakharov conditions needed to explain the observed baryon asymmetry of the universe. The amount of CP violation in the quark sector, introduced via the CKM matrix, is however not sufficient to explain the baryon asymmetry in the context of the Standard Model.
Additional sources of CP violation could be present in the production and decay of the Higgs boson. The production via vector-boson fusion allows to study the CP structure of the Higgs-boson coupling to electroweak gauge bosons. In this talk, first studies performed with the CP-odd Optimale Observable with Run-2 LHC data are presented.
The analyis uses the decay H→τlτh and data collected with the ATLAS detector in 2015 and 2016 at √s = 13 TeV, corresponding to an integrated luminosity of ∫L = 36.5 fb−1.