Münster 2017 – scientific programme

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T: Fachverband Teilchenphysik

T 74: Higgs-Boson 7 (Paarproduktion, Quantenzahlen)

T 74.9: Talk

Wednesday, March 29, 2017, 18:45–19:00, JUR 5

Investigation of the CP Nature of the Higgs Boson in VBF H→ ττ Events at √s = 13 TeV — •Serhat Ördek, Michel Janus, and Stan Lai — II. Physikalisches Institut, Georg-August-Universität Göttingen

In 2012, ATLAS and CMS independently reported the observation of a new particle. So far, all measured properties of this particle are consistent with the Standard Model Higgs boson and the data seems to be compatible with a scalar boson. However, the available precision does not exclude a CP-mixed state, which could be a source of the baryon asymmetry in our universe.

This talk will describe studies of the “Optimal Observable” method used to measure the CP nature of the new particle as seen in its production via vector boson fusion in the context of the ATLAS experiment. Validation of the reweighting using 13 TeV Monte Carlo samples was performed, and tested on both LO and NLO signal events. Furthermore, additional studies on the calculation of the Optimal Observable are discussed.