Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.11851/9722
Title: Test of CP invariance in vector-boson fusion production of the Higgs boson using the Optimal Observable method in the ditau decay channel with the ATLAS detector
Authors: Aad, G.
Abbott, B.
Abdinov, O.
Abdallah, J.
Abeloos, B.
Aben, R.
Adamczyk, L.
Keywords: Triple Gauge Couplings
Tau-Polarization
W-Boson
Hadron Colliders
W+W-Production
Cross-Section
Asymmetry
Violation
Program
Nlo
Issue Date: 2016
Publisher: Springer
Abstract: A test of CP invariance in Higgs boson production via vector-boson fusion using the method of the Optimal Observable is presented. The analysis exploits the decay mode of the Higgs boson into a pair of t leptons and is based on 20.3 fb(-1) of proton-proton collision data at root s = 8 TeV collected by the ATLAS experiment at the LHC. Contributions from CP-violating interactions between the Higgs boson and electroweak gauge bosons are described in an effective field theory framework, in which the strength of CP violation is governed by a single parameter (d) over tilde. 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 (d) over tilde is constrained to the interval (-0.11, 0.05) at 68% confidence level, consistent with the Standard Model expectation of (d) over tilde = 0.
URI: https://doi.org/10.1140/epjc/s10052-016-4499-5
https://hdl.handle.net/20.500.11851/9722
ISSN: 1434-6044
1434-6052
Appears in Collections:PubMed İndeksli Yayınlar Koleksiyonu / PubMed Indexed Publications Collection
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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