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 JP=0+ hypothesis is compared with alternative hypotheses using the Higgs boson decays H→γγ, H→ZZ*→4ℓ and...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
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2013
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| _version_ | 1826257773174718464 |
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| author | Aad, G Abajyan, T Abbott, B Abdallah, J Khalek, SA Abdinov, O Aben, R Abi, B Abolins, M AbouZeid, O Abramowicz, H Abreu, H Abulaiti, Y Acharya, B Adamczyk, L Adams, D Addy, T Adelman, J Adomeit, S Adye, T Aefsky, S Aguilar-Saavedra, J Agustoni, M Ahlen, S Ahmad, A |
| author_facet | Aad, G Abajyan, T Abbott, B Abdallah, J Khalek, SA Abdinov, O Aben, R Abi, B Abolins, M AbouZeid, O Abramowicz, H Abreu, H Abulaiti, Y Acharya, B Adamczyk, L Adams, D Addy, T Adelman, J Adomeit, S Adye, T Aefsky, S Aguilar-Saavedra, J Agustoni, M Ahlen, S Ahmad, A |
| author_sort | Aad, G |
| collection | OXFORD |
| 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 JP=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 JP=0+ quantum numbers for the Higgs boson, whereas all alternative hypotheses studied in this Letter, namely some specific JP=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 JP=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. |
| first_indexed | 2024-03-06T18:23:29Z |
| format | Journal article |
| id | oxford-uuid:071ca841-8e9f-486b-9a19-17a1d2f59dc4 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T18:23:29Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | oxford-uuid:071ca841-8e9f-486b-9a19-17a1d2f59dc42022-03-26T09:05:58ZEvidence for the spin-0 nature of the Higgs boson using ATLAS dataJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:071ca841-8e9f-486b-9a19-17a1d2f59dc4EnglishSymplectic Elements at Oxford2013Aad, GAbajyan, TAbbott, BAbdallah, JKhalek, SAAbdinov, OAben, RAbi, BAbolins, MAbouZeid, OAbramowicz, HAbreu, HAbulaiti, YAcharya, BAdamczyk, LAdams, DAddy, TAdelman, JAdomeit, SAdye, TAefsky, SAguilar-Saavedra, JAgustoni, MAhlen, SAhmad, AStudies 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 JP=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 JP=0+ quantum numbers for the Higgs boson, whereas all alternative hypotheses studied in this Letter, namely some specific JP=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 JP=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. |
| spellingShingle | Aad, G Abajyan, T Abbott, B Abdallah, J Khalek, SA Abdinov, O Aben, R Abi, B Abolins, M AbouZeid, O Abramowicz, H Abreu, H Abulaiti, Y Acharya, B Adamczyk, L Adams, D Addy, T Adelman, J Adomeit, S Adye, T Aefsky, S Aguilar-Saavedra, J Agustoni, M Ahlen, S Ahmad, A Evidence for the spin-0 nature of the Higgs boson using ATLAS data |
| title | 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_short | 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 |
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