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Wuppertal 2015 – scientific programme

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T: Fachverband Teilchenphysik

T 91: Higgs: Htautau (CP und Polarisierung)

T 91.3: Talk

Thursday, March 12, 2015, 17:15–17:30, M.10.12 (HS 14)

Studies of the Higgs CP properties in the τ decay channel with the CMS experimentJoram Berger2, Rene Caspart2, Vladimir Cherepanov1, Fabio Colombo2, Günter Flügge1, Felix Frensch2, Raphael Friese2, Andrew Gilbert2, Bastian Kargoll1, Thomas Müller2, Alexander Nehrkorn1, Ian M. Nugent1, •Claudia Pistone1, Günter Quast2, Achim Stahl1, Benjamin Treiber2, Roger Wolf2, and Alexander Zozt11III. Physikalisches Institut B, RWTH Aachen University, D-52056 Aachen — 2Institut für Experimentelle Kernphysik (IEKP), KIT

In 2012 the ATLAS and CMS collaborations announced the discovery of a Higgs-like boson with a mass of 125 GeV. Since then, many analyses are working on measurements of its properties to completely unravel the nature of this resonance. We want to focus on the study of the CP couplings of a Higgs boson decaying into tau lepton pairs, since this channel is particularly suited in this respect. Our approach is based on studying the distribution of a signed angle φCP* between the decay planes of the τ’s, whic is sensitive to the Higgs CP properties. However, the expected discrimination power between CP-even and CP-odd on generator level gets worse at the reconstruction level. An investigation of this worsening effect via Monte Carlo studies is presented.

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