Evidence for the spin-0 nature of the Higgs boson using ATLAS data
Studies of the spin and parity quantum numbers of the Higgs boson are presented, based on proton-proton collision data collected by the ATLAS experiment at the LHC. The Standard Model spin-parity J P =0 + hypothesis is compared with alternative hypotheses using the Higgs boson decays H→γγ, H→ZZ * →4...
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2013
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Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03702693_v726_n1-3_p120_Aad http://hdl.handle.net/20.500.12110/paper_03702693_v726_n1-3_p120_Aad |
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paper:paper_03702693_v726_n1-3_p120_Aad2023-06-08T15:37:14Z Evidence for the spin-0 nature of the Higgs boson using ATLAS data Higgs boson Parity Spin Studies of the spin and parity quantum numbers of the Higgs boson are presented, based on proton-proton collision data collected by the ATLAS experiment at the LHC. The Standard Model spin-parity J P =0 + hypothesis is compared with alternative hypotheses using the Higgs boson decays H→γγ, H→ZZ * →4ℓ and H→WW * →ℓνℓν, as well as the combination of these channels. The analysed dataset corresponds to an integrated luminosity of 20.7 fb -1 collected at a centre-of-mass energy of s=8TeV. For the H→ZZ * →4ℓ decay mode the dataset corresponding to an integrated luminosity of 4.6 fb -1 collected at s=7TeV is included. The data are compatible with the Standard Model J P =0 + quantum numbers for the Higgs boson, whereas all alternative hypotheses studied in this Letter, namely some specific J P =0 - , 1 + , 1 - , 2 + models, are excluded at confidence levels above 97.8%. This exclusion holds independently of the assumptions on the coupling strengths to the Standard Model particles and in the case of the J P =2 + model, of the relative fractions of gluon-fusion and quark-antiquark production of the spin-2 particle. The data thus provide evidence for the spin-0 nature of the Higgs boson, with positive parity being strongly preferred. © 2013 CERN. 2013 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03702693_v726_n1-3_p120_Aad http://hdl.handle.net/20.500.12110/paper_03702693_v726_n1-3_p120_Aad |
institution |
Universidad de Buenos Aires |
institution_str |
I-28 |
repository_str |
R-134 |
collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
topic |
Higgs boson Parity Spin |
spellingShingle |
Higgs boson Parity Spin Evidence for the spin-0 nature of the Higgs boson using ATLAS data |
topic_facet |
Higgs boson Parity Spin |
description |
Studies of the spin and parity quantum numbers of the Higgs boson are presented, based on proton-proton collision data collected by the ATLAS experiment at the LHC. The Standard Model spin-parity J P =0 + hypothesis is compared with alternative hypotheses using the Higgs boson decays H→γγ, H→ZZ * →4ℓ and H→WW * →ℓνℓν, as well as the combination of these channels. The analysed dataset corresponds to an integrated luminosity of 20.7 fb -1 collected at a centre-of-mass energy of s=8TeV. For the H→ZZ * →4ℓ decay mode the dataset corresponding to an integrated luminosity of 4.6 fb -1 collected at s=7TeV is included. The data are compatible with the Standard Model J P =0 + quantum numbers for the Higgs boson, whereas all alternative hypotheses studied in this Letter, namely some specific J P =0 - , 1 + , 1 - , 2 + models, are excluded at confidence levels above 97.8%. This exclusion holds independently of the assumptions on the coupling strengths to the Standard Model particles and in the case of the J P =2 + model, of the relative fractions of gluon-fusion and quark-antiquark production of the spin-2 particle. The data thus provide evidence for the spin-0 nature of the Higgs boson, with positive parity being strongly preferred. © 2013 CERN. |
title |
Evidence for the spin-0 nature of the Higgs boson using ATLAS data |
title_short |
Evidence for the spin-0 nature of the Higgs boson using ATLAS data |
title_full |
Evidence for the spin-0 nature of the Higgs boson using ATLAS data |
title_fullStr |
Evidence for the spin-0 nature of the Higgs boson using ATLAS data |
title_full_unstemmed |
Evidence for the spin-0 nature of the Higgs boson using ATLAS data |
title_sort |
evidence for the spin-0 nature of the higgs boson using atlas data |
publishDate |
2013 |
url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03702693_v726_n1-3_p120_Aad http://hdl.handle.net/20.500.12110/paper_03702693_v726_n1-3_p120_Aad |
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1768545558501261312 |