Study of the spin and parity of the Higgs boson in diboson decays with the ATLAS detector

ATLAS, Collaboration; Beck, Hans Peter; Cervelli, Alberto; Ereditato, Antonio; Haug, Sigve; Kabana, Sonja; Meloni, Federico; Mullier, Geoffrey André Adrien; Pretzl, Klaus-Peter; Stramaglia, Maria Elena; Stucci, Stefania; Weber, Michael (2015). Study of the spin and parity of the Higgs boson in diboson decays with the ATLAS detector. European physical journal. C - particles and fields, C75(10), p. 476. EDP Sciences 10.1140/epjc/s10052-015-3685-1

Preview

Text art%3A10.1140%2Fepjc%2Fs10052-015-3685-1.pdf - Published Version Available under License Creative Commons: Attribution (CC-BY). Download (2MB) | Preview

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 J P =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.

Interest & Impact

Downloads

73 since deposited on 08 Sep 2016
7 in the past 12 months

Citations

5 Citations in Web of Science ®
6 Citations in Scopus

Search

in Google Scholar™

Services

Actions (login required)

Edit item

Actions (login required)

Edit item