Würzburg 2018 – scientific programme
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T: Fachverband Teilchenphysik
T 57: Higgs III
T 57.7: Talk
Wednesday, March 21, 2018, 18:00–18:15, Z6 - HS 0.004
Test of CP invariance in vector-boson fusion production of the Higgs boson in H→τlepτlep decays at √s=13 TeV with the ATLAS detector — Elias Coniavitis1, •Alena Lösle1, Ulrike Schnoor2, and Markus Schumacher1 — 1Physikalisches Institut, Universität Freiburg — 2CERN
Violation of CP invariance is one of the Sakharov conditions to explain the observed baryon asymmetry in our universe. While CP violation is already realised in the Standard Model via the CKM matrix, it is not sufficient to explain the amount of observed baryon asymmetry. Hence, it is interesting to search for new sources of CP violation in the Higgs sector. The vector-boson fusion production allows to investigate the CP structure of the Higgs-boson coupling to electroweak gauge bosons and to test CP invariance in this interaction.
The analysis discussed in this talk is performed in the H→τlepτlep decay channel and uses the CP-odd Optimal Observable. First studies based on data taken by the ATLAS detector in 2015 and 2016 at √s=13 TeV corresponding to an integrated luminosity of 36.1 fb−1 are presented.