Hamburg 2016 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 47: Higgs-Boson (Eigenschaften) (theo.+exp.)
T 47.8: Vortrag
Dienstag, 1. März 2016, 18:30–18:45, VMP5 HS B1
Study of the Higgs CP properties in the τ τ decay channel with the CMS experiment — Vladimir Cherepanov, Günter Flügge, Bastian Kargoll, Wolfgang Lohmann, Alexander Nehrkorn, Ian M. Nugent, •Claudia Pistone, Achim Stahl, and Alexander Zotz — III. Physikalisches Institut B, RWTH Aachen University, D-52056 Aachen
In 2012 the discovery of a Higgs boson with mass of 125 GeV was announced by the ATLAS and CMS collaborations. Since then, efforts were focused on the measurement of its properties and thus the complete determination of the nature of this particle. We study the CP quantum numbers of the Higgs boson in its decay into tau lepton pairs. Our approach uses the distribution of the signed angle ϕCP* between the decay planes of the tau leptons, which is sensitive to the Higgs CP properties. At the generator level we observe the expected discrimination power between CP-even and CP-odd states, and the results are presented. The sensitivity of our observable is also being investigated at the reconstruction level, and results are presented as well.