Aachen 2019 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
T: Fachverband Teilchenphysik
T 28: Higgs-Zerfälle in Fermionen I
T 28.9: Vortrag
Dienstag, 26. März 2019, 18:05–18:20, H04
Test of CP invariance in vector-boson fusion production of the Higgs boson using H→τlepτlep decays at √s=13 TeV with the ATLAS detector — Kathrin Becker, •Alena Lösle, and Markus Schumacher — Physikalisches Institut, Universität Freiburg
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 combined results with the semi-leptonic and fully-hadronic finally state based on data taken by the ATLAS detector at √s=13 TeV corresponding to an integrated luminosity of 36.1 fb−1 are presented.