Springer New York;Berlin/Heidelberg: Springer Verlag
摘要:
摘要： Studies of the spin, parity and tensor couplings of the Higgs boson in the H→ZZ∗→4ℓ , H→WW∗→eνμν and H→γγ decay processes at the LHC are presented. The investigations are based on 25 fb−1 of pp collision data collected by the ATLAS experiment at s√=7 TeV and s√=8 TeV. The Standard Model (SM) Higgs boson hypothesis, corresponding to the quantum numbers JP=0+, is tested against several alternative spin scenarios, including non-SM spin-0 and spin-2 models with universal and non-universal couplings to fermions and vector bosons. All tested alternative models are excluded in favour of the SM Higgs boson hypothesis at more than 99.9% confidence level. Using the H→ZZ∗→4ℓ and H→WW∗→eνμν decays, the tensor structure of the HVV interaction in the spin-0 hypothesis is also investigated. The observed distributions of variables sensitive to the non-SM tensor couplings are compatible with the SM predictions and constraints on the non-SM couplings are derived. 其他題名： Eur. Phys. J. C 其他題名： Eur Phys J C Part Fields 出版者： Berlin/Heidelberg: Springer Verlag 出版日期： 2015 出處： The European physical journal. C, Particles and fields, 2015, Vol.75 (10), p.476-36 資源來源： SWEPUB Freely available online 版權： CERN for the benefit of the ATLAS collaboration 2015 版權： COPYRIGHT 2015 Springer 版權： SIF and Springer-Verlag Berlin Heidelberg 2015 版權： licence_http://creativecommons.org/publicdomain/zero 識別號： ISSN: 1434-6044 識別號： ISSN: 1434-6052 識別號： EISSN: 1434-6052 識別號： DOI: 10.1140/epjc/s10052-015-3685-1 識別號： PMID: 26472935
