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

Abstract

© 2016, CERN for the benefit of the ATLAS collaboration.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.

Metadata

Item Type:	Article
Authors/Creators:	Aad, G Abbott, B Abdinov, O Abdallah, J Abeloos, B Aben, R Abolins, M Aben, R Abolins, M AbouZeid, OS Abraham, NL Abramowicz, H Abreu, H Abreu, R Abulaiti, Y Acharya, BS Adamczyk, L Adams, DL Adelman, J Adomeit, S Adye, T Affolder, AA Agatonovic-Jovin, T Agricola, J Aguilar-Saavedra, JA Ahlen, SP Ahmadov, F Aielli, G Akerstedt, H Åkesson, TPA Akimov, AV Alberghi, GL Albert, J Albrand, S Verzini, MJA Aleksa, M Aleksandrov, IN Alexa, C Alexander, G Alexopoulos, T Alhroob, M Alimonti, G Alison, J Alkire, SP Allbrooke, BMM Allen, BW Allport, PP Aloisio, A Alonso, A Alonso, F Alpigiani, C Gonzalez, BA Piqueras, DÁ Alviggi, MG Amadio, BT Amako, K Coutinho, YA Amelung, C Amidei, D Santos, SPAD Amorim, A Amoroso, S Amram, N Amundsen, G Anastopoulos, C Ancu, LS Andari, N Andeen, T Anders, CF Anders, G Anders, JK Anderson, KJ Andreazza, A Andrei, V Angelidakis, S Angelozzi, I Anger, P Angerami, A Anghinolfi, F Anisenkov, AV Anjos, N Annovi, A Antonelli, M Antonov, A Antos, J
Copyright, Publisher and Additional Information:	© CERN for the benefit of the ATLAS collaboration 2016. This article is published with open access at Springerlink.com
Dates:	Published: 29 November 2016 Published (online): 29 November 2016 Accepted: 8 November 2016
Institution:	The University of Sheffield
Academic Units:	The University of Sheffield > Faculty of Science (Sheffield) > Department of Physics and Astronomy (Sheffield)
Depositing User:	Symplectic Sheffield
Date Deposited:	05 Jan 2017 15:28
Last Modified:	05 Jan 2017 15:28
Published Version:	https://doi.org/10.1140/epjc/s10052-016-4499-5
Status:	Published
Publisher:	Springer
Refereed:	Yes
Identification Number:	10.1140/epjc/s10052-016-4499-5
Open Archives Initiative ID (OAI ID):	oai:eprints.whiterose.ac.uk:110084

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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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