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Article: Evidence for Higgs boson decays to a low-mass dilepton system and a photon in pp collisions at √s=13 TeV with the ATLAS detector

TitleEvidence for Higgs boson decays to a low-mass dilepton system and a photon in pp collisions at √s=13 TeV with the ATLAS detector
Authors
Issue Date2021
PublisherElsevier: SCOAP3. The Journal's web site is located at http://www.elsevier.com/locate/physletb
Citation
Physics Letters B, 2021, v. 819, p. article no. 136412 How to Cite?
AbstractA search for the Higgs boson decaying into a photon and a pair of electrons or muons with an invariant mass mℓℓ<30 GeV is presented. The analysis is performed using 139 fb−1 of proton–proton collision data, produced by the LHC at a centre-of-mass energy of 13 TeV and collected by the ATLAS experiment. Evidence for the H→ℓℓγ process is found with a significance of 3.2 over the background-only hypothesis, compared to an expected significance of 2.1 for the Standard Model prediction. The best-fit value of the signal-strength parameter, defined as the ratio of the observed signal yield to the one expected in the Standard Model, is μ=1.5±0.5. The Higgs boson production cross-section times the H→ℓℓγ branching ratio for mℓℓ<30 GeV is determined to be 8.7−2.7+2.8 fb. © 2021 The Author
Persistent Identifierhttp://hdl.handle.net/10722/302085
ISSN
2020 Impact Factor: 4.771
2020 SCImago Journal Rankings: 2.093

 

DC FieldValueLanguage
dc.contributor.authorParedes Hernandez, D-
dc.contributor.authorPENG, C-
dc.contributor.authorTAM, KC-
dc.contributor.authorTu, Y-
dc.contributor.authorThe ATLAS Collaboration,-
dc.date.accessioned2021-08-21T03:31:21Z-
dc.date.available2021-08-21T03:31:21Z-
dc.date.issued2021-
dc.identifier.citationPhysics Letters B, 2021, v. 819, p. article no. 136412-
dc.identifier.issn0370-2693-
dc.identifier.urihttp://hdl.handle.net/10722/302085-
dc.description.abstractA search for the Higgs boson decaying into a photon and a pair of electrons or muons with an invariant mass mℓℓ<30 GeV is presented. The analysis is performed using 139 fb−1 of proton–proton collision data, produced by the LHC at a centre-of-mass energy of 13 TeV and collected by the ATLAS experiment. Evidence for the H→ℓℓγ process is found with a significance of 3.2 over the background-only hypothesis, compared to an expected significance of 2.1 for the Standard Model prediction. The best-fit value of the signal-strength parameter, defined as the ratio of the observed signal yield to the one expected in the Standard Model, is μ=1.5±0.5. The Higgs boson production cross-section times the H→ℓℓγ branching ratio for mℓℓ<30 GeV is determined to be 8.7−2.7+2.8 fb. © 2021 The Author-
dc.languageeng-
dc.publisherElsevier: SCOAP3. The Journal's web site is located at http://www.elsevier.com/locate/physletb-
dc.relation.ispartofPhysics Letters B-
dc.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.-
dc.titleEvidence for Higgs boson decays to a low-mass dilepton system and a photon in pp collisions at √s=13 TeV with the ATLAS detector-
dc.typeArticle-
dc.identifier.emailParedes Hernandez, D: dparedes@hku.hk-
dc.identifier.emailTu, Y: yanjuntu@hku.hk-
dc.identifier.authorityTu, Y=rp01971-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1016/j.physletb.2021.136412-
dc.identifier.scopuseid_2-s2.0-85110648956-
dc.identifier.hkuros324315-
dc.identifier.volume819-
dc.identifier.spagearticle no. 136412-
dc.identifier.epagearticle no. 136412-
dc.publisher.placeNetherlands-

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