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Please use this identifier to cite or link to this item: http://bura.brunel.ac.uk/handle/2438/31354
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dc.contributor.authorHayrapetyan, A-
dc.contributor.authorTumasyan, A-
dc.contributor.authorAdam, W-
dc.contributor.authorAndrejkovic, JW-
dc.contributor.authorBergauer, T-
dc.contributor.authorChatterjee, S-
dc.contributor.authorDamanakis, K-
dc.contributor.authorDragicevic, M-
dc.contributor.authorHoang, A-
dc.contributor.authorHussain, PS-
dc.contributor.authorJeitler, M-
dc.contributor.authorGokbulut, G-
dc.contributor.authorHong, Y-
dc.contributor.authorKnolle, J-
dc.contributor.authorLambrecht, L-
dc.contributor.authorMarckx, D-
dc.contributor.authorMota Amarilo, K-
dc.contributor.authorSamalan, A-
dc.contributor.authorSkovpen, K-
dc.contributor.authorVan Den Bossche, N-
dc.contributor.authorvan der Linden, J-
dc.contributor.authorWezenbeek, L-
dc.contributor.authorBenecke, A-
dc.contributor.authorBethani, A-
dc.contributor.authorBruno, G-
dc.contributor.authorCaputo, C-
dc.contributor.authorDe Favereau De Jeneret, J-
dc.contributor.authorDelaere, C-
dc.contributor.authorDonertas, IS-
dc.contributor.authorGiammanco, A-
dc.contributor.authorGuzel, AO-
dc.contributor.authorJain, S-
dc.contributor.authorLemaitre, V-
dc.contributor.authorLidrych, J-
dc.contributor.authorMastrapasqua, P-
dc.contributor.authorTran, TT-
dc.contributor.authorWertz, S-
dc.contributor.authorAlves, GA-
dc.contributor.authorAlves Gallo Pereira, M-
dc.contributor.authorCoelho, E-
dc.contributor.authorCorreia Silva, G-
dc.contributor.authorHensel, C-
dc.contributor.authorMenezes De Oliveira, T-
dc.contributor.authorMora Herrera, C-
dc.contributor.authorMoraes, A-
dc.contributor.authorReid, ID-
dc.contributor.authorRebello Teles, P-
dc.contributor.authorSoeiro, M-
dc.contributor.authorVilela Pereira, A-
dc.contributor.authorKyberd, P-
dc.contributor.authorAldá, WL-
dc.contributor.authorBarroso Ferreira Filho, M-
dc.contributor.authorKhan, A-
dc.contributor.authorBrandao Malbouisson, H-
dc.contributor.authorCole, JE-
dc.contributor.authorColdham, K-
dc.contributor.authorKrammer, N-
dc.contributor.authorLi, A-
dc.contributor.authorLiko, D-
dc.contributor.authorMikulec, I-
dc.contributor.authorSchieck, J-
dc.contributor.authorSchöfbeck, R-
dc.contributor.authorSchwarz, D-
dc.contributor.authorSonawane, M-
dc.contributor.authorTempl, S-
dc.contributor.authorWaltenberger, W-
dc.contributor.authorWulz, CE-
dc.contributor.authorJanssen, T-
dc.contributor.authorVan Laer, T-
dc.contributor.authorVan Mechelen, P-
dc.contributor.authorBreugelmans, N-
dc.contributor.authorD'Hondt, J-
dc.contributor.authorDansana, S-
dc.contributor.authorDe Moor, A-
dc.contributor.authorDelcourt, M-
dc.contributor.authorHeyen, F-
dc.contributor.authorLowette, S-
dc.contributor.authorMakarenko, I-
dc.contributor.authorMüller, D-
dc.contributor.authorTavernier, S-
dc.contributor.authorTytgat, M-
dc.contributor.authorVan Onsem, GP-
dc.contributor.authorVan Putte, S-
dc.contributor.authorVannerom, D-
dc.contributor.authorBilin, B-
dc.contributor.authorClerbaux, B-
dc.contributor.authorDas, AK-
dc.contributor.authorDe Lentdecker, G-
dc.contributor.authorEvard, H-
dc.contributor.authorFavart, L-
dc.contributor.authorGianneios, P-
dc.contributor.authorJaramillo, J-
dc.contributor.authorKhalilzadeh, A-
dc.contributor.authorKhan, FA-
dc.contributor.authorLee, K-
dc.contributor.authorMahdavikhorrami, M-
dc.contributor.authorMalara, A-
dc.contributor.authorParedes, S-
dc.contributor.authorShahzad, MA-
dc.contributor.authorThomas, L-
dc.contributor.authorVanden Bemden, M-
dc.contributor.authorVander Velde, C-
dc.contributor.authorVanlaer, P-
dc.contributor.authorDe Coen, M-
dc.contributor.authorDobur, D-
dc.contributor.otherCMS collaboration-
dc.date.accessioned2025-05-30T14:45:09Z-
dc.date.available2025-05-30T14:45:09Z-
dc.date.issued2024-10-23-
dc.identifierORCiD: A. Tumasyan https://orcid.org/0009-0001-6311-3104-
dc.identifierORCiD: Joanne E. Cole https://orcid.org/0000-0001-5638-7599-
dc.identifierORCiD: Akram Khan https://orcid.org/0000-0002-4597-4402-
dc.identifierORCiD: Paul Kyberd https://orcid.org/0000-0002-7353-7090-
dc.identifierORCiD: Ivan D. Reid https://orcid.org/0000-0002-9235-779X-
dc.identifierArticle number: 117801-
dc.identifierCMS-TOP-23-001-
dc.identifierCERN-EP-2024-137-
dc.identifierarXiv:2406.03976v2 [hep-ex]-
dc.identifier.citationHayrapetyan, A., Tumasyan, A. et al. for the benefit of the CMS collaboration (2024) 'Observation of quantum entanglement in top quark pair production in proton-proton collisions at √ s = 13 TeV', Reports on Progress in Physics, 87 (11), 117801, pp. 1 - 33. doi: 10.1088/1361-6633/ad7e4d.en_US
dc.identifier.issn0034-4885-
dc.identifier.urihttps://bura.brunel.ac.uk/handle/2438/31354-
dc.descriptionData availability statement: Release and preservation of data used by the CMS Collaboration as the basis for publications is guided by the CMS data preservation, re-use, and open access policy.en_US
dc.descriptionA preprint version of the article is available at arXiv:2406.03976v2 [hep-ex] (the peer reviewed version, https://arxiv.org/abs/2406.03976). Comments: Replaced with the published version. Added the journal reference and the DOI. Journal reference: Rep. Prog. Phys. 87 (2024) 117801. All the figures and tables can be found at https://cms-results.web.cern.ch/cms-results/public-results/publications/TOP-23-001 (CMS Public Pages). Report numbers: CMS-TOP-23-001, CERN-EP-2024-137. Submission history: [v2] Tue, 29 Oct 2024 12:35:26 UTC (840 KB).-
dc.description.abstractEntanglement is an intrinsic property of quantum mechanics and is predicted to be exhibited in the particles produced at the Large Hadron Collider. A measurement of the extent of entanglement in top quark-antiquark ( t t ¯ ) events produced in proton-proton collisions at a center-of-mass energy of 13 TeV is performed with the data recorded by the CMS experiment at the CERN LHC in 2016, and corresponding to an integrated luminosity of 36.3 fb^−1. The events are selected based on the presence of two leptons with opposite charges and high transverse momentum. An entanglement-sensitive observable D is derived from the top quark spin-dependent parts of the t t ¯ production density matrix and measured in the region of the t t ¯ production threshold. Values of D < − 1 / 3 are evidence of entanglement and D is observed (expected) to be − 0.480 − 0.029 + 0.026 ( − 0.467 − 0.029 + 0.026 ) at the parton level. With an observed significance of 5.1 standard deviations with respect to the non-entangled hypothesis, this provides observation of quantum mechanical entanglement within t t ¯ pairs in this phase space. This measurement provides a new probe of quantum mechanics at the highest energies ever produced.en_US
dc.description.sponsorshipSCOAP3.en_US
dc.format.extent1 - 33-
dc.format.mediumPrint-Electronic-
dc.language.isoen_USen_US
dc.publisherIOP Publishingen_US
dc.relation.urihttps://cms-results.web.cern.ch/cms-results/public-results/publications/TOP-23-001-
dc.relation.urihttps://arxiv.org/abs/2406.03976-
dc.rightsCreative Commons Attribution 4.0 International-
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/-
dc.subjecthigh energy physics - experiment (hep-ex)en_US
dc.titleObservation of quantum entanglement in top quark pair production in proton-proton collisions at √ s = 13 TeVen_US
dc.typeArticleen_US
dc.identifier.doihttps://doi.org/10.1088/1361-6633/ad7e4d-
dc.relation.isPartOfReports on Progress in Physics-
pubs.issue11-
pubs.publication-statusPublished-
pubs.volume87-
dc.identifier.eissn1361-6633-
dc.rights.licensehttps://creativecommons.org/licenses/by/4.0/legalcode.en-
dc.rights.holderCERN, for the benefit of the CMS Collaboration-
Appears in Collections:Dept of Electronic and Electrical Engineering Research Papers

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