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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
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ATLAS collaboration (Including: Beckingham, M., Ennis, Joseph Stanford, Farrington, Sinead, Harrison, P. F., Jeske, C., Jones, G. (Graham), Martin, T. A., Murray, W., Pianori, E. and Spangenberg, Martin). (2016) 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. European Physical Journal C, 76 (12). 658. doi:10.1140/epjc/s10052-016-4499-5
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Aad2016_Article_TestOfCPInvarianceInVector-bos.pdf - Published Version - Requires a PDF viewer. Available under License Creative Commons Attribution 4.0. Download (2211Kb) | Preview |
Official URL: http://dx.doi.org/10.1140/epjc/s10052-016-4499-5
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 τ leptons 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. 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~. 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~ is constrained to the interval (−0.11,0.05) at 68% confidence level, consistent with the Standard Model expectation of d~=0.
| Item Type: | Journal Article | |||||||||
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| Subjects: | Q Science > QC Physics | |||||||||
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | |||||||||
| Library of Congress Subject Headings (LCSH): | Higgs bosons, Leptons (Nuclear physics) -- Decay, Large Hadron Collider (France and Switzerland) | |||||||||
| Journal or Publication Title: | European Physical Journal C | |||||||||
| Publisher: | Springer | |||||||||
| ISSN: | 1434-6044 | |||||||||
| Official Date: | 29 November 2016 | |||||||||
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| Volume: | 76 | |||||||||
| Number: | 12 | |||||||||
| Article Number: | 658 | |||||||||
| DOI: | 10.1140/epjc/s10052-016-4499-5 | |||||||||
| Status: | Peer Reviewed | |||||||||
| Publication Status: | Published | |||||||||
| Access rights to Published version: | Open Access | |||||||||
| RIOXX Funder/Project Grant: |
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