Test of CP-invariance in Vector Boson Fusion production of the Higgs Boson using the optimal observable method in the di-tau decay channel with the ATLAS detector
A test of CP invariance in Higgs boson production via Vector Boson Fusion using the optimal observable method is presented. The analysis exploits the decay mode of the Higgs boson into a pair of tau leptons in the decay channels H → TlTl and H → TlT_had and is based on 20.3 fb⁻¹ of proton-proton col...
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University of Warwick
2016
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| Online Access: | https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.731322 |
| Summary: | A test of CP invariance in Higgs boson production via Vector Boson Fusion using the optimal observable method is presented. The analysis exploits the decay mode of the Higgs boson into a pair of tau leptons in the decay channels H → TlTl and H → TlT_had and is based on 20.3 fb⁻¹ of proton-proton collision data at √s = 8 Tev collected by the ATLAS experiment at the LHC. CP-violating interactions between the Higgs boson and electroweak gauge bosons are described in an effective field theory framework, where the strength of CP violation is governed by a single parameter d̃. The mean values and distributions of CP-odd observables agree with the expectation in the Standard Model and show no sign of CP violation. The CP-mixing parameter d̃ is constrained to the interval [-0.11, 0.05] at the 68% confidence level, consistent with the Standard Model expectation of d̃ = 0. |
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