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| 001 | 612173 | ||
| 005 | 20241201104710.0 | ||
| 024 | 7 | _ | |a CMS:2024pts |2 INSPIRETeX |
| 024 | 7 | _ | |a inspire:2795514 |2 inspire |
| 024 | 7 | _ | |a arXiv:2406.03976 |2 arXiv |
| 024 | 7 | _ | |a 10.3204/PUBDB-2024-05186 |2 datacite_doi |
| 037 | _ | _ | |a PUBDB-2024-05186 |
| 041 | _ | _ | |a English |
| 088 | _ | _ | |a arXiv:2406.03976 |2 arXiv |
| 088 | _ | _ | |a CMS-TOP-23-001 |2 CMS |
| 088 | _ | _ | |a CERN-EP-2024-137 |2 CERN |
| 100 | 1 | _ | |a CMS Collaboration |0 P:(DE-HGF)0 |b 0 |e Collaboration author |
| 245 | _ | _ | |a Observation of quantum entanglement in top quark pair production in proton-proton collisions at $\sqrt{s}$ = 13 TeV |
| 260 | _ | _ | |c 2024 |
| 336 | 7 | _ | |a Preprint |b preprint |m preprint |0 PUB:(DE-HGF)25 |s 1722432897_2814414 |2 PUB:(DE-HGF) |
| 336 | 7 | _ | |a WORKING_PAPER |2 ORCID |
| 336 | 7 | _ | |a Electronic Article |0 28 |2 EndNote |
| 336 | 7 | _ | |a preprint |2 DRIVER |
| 336 | 7 | _ | |a ARTICLE |2 BibTeX |
| 336 | 7 | _ | |a Output Types/Working Paper |2 DataCite |
| 500 | _ | _ | |a Die Autorenliste wurde beim Inspire-Import nicht übermittelt! Auch nicht über arXiv! |
| 520 | _ | _ | |a Entanglement 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 ($\mathrm{t\bar{t}}$) 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 $\mathrm{t\bar{t}}$ production density matrix and measured in the region of the $\mathrm{t\bar{t}}$ production threshold. Values of $D\lt-$1/3 are evidence of entanglement and $D$ is observed (expected) to be $-$0.480$^{+0.026}_{-0.029}$ ($-$0.467$^{+0.026}_{-0.029}$) 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 $\mathrm{t\bar{t}}$ pairs in this phase space. This measurement provides a new probe of quantum mechanics at the highest energies ever produced. |
| 536 | _ | _ | |a 611 - Fundamental Particles and Forces (POF4-611) |0 G:(DE-HGF)POF4-611 |c POF4-611 |f POF IV |x 0 |
| 536 | _ | _ | |a DFG project 390833306 - EXC 2121: Quantum Universe (390833306) |0 G:(GEPRIS)390833306 |c 390833306 |x 1 |
| 536 | _ | _ | |a GRK 2497 - GRK 2497: Physik der schwersten Teilchen am Large Hadron Collider (400140256) |0 G:(GEPRIS)400140256 |c 400140256 |x 2 |
| 588 | _ | _ | |a Dataset connected to INSPIRE |
| 650 | _ | 7 | |a p p: colliding beams |2 INSPIRE |
| 650 | _ | 7 | |a top: pair production |2 INSPIRE |
| 650 | _ | 7 | |a p p: scattering |2 INSPIRE |
| 650 | _ | 7 | |a spin: dependence |2 INSPIRE |
| 650 | _ | 7 | |a quantum mechanics: entanglement |2 INSPIRE |
| 650 | _ | 7 | |a threshold: production |2 INSPIRE |
| 650 | _ | 7 | |a entanglement: quantum |2 INSPIRE |
| 650 | _ | 7 | |a Bell inequality |2 INSPIRE |
| 650 | _ | 7 | |a lepton: transverse momentum |2 INSPIRE |
| 650 | _ | 7 | |a transverse momentum: high |2 INSPIRE |
| 650 | _ | 7 | |a CERN LHC Coll |2 INSPIRE |
| 650 | _ | 7 | |a CMS |2 INSPIRE |
| 650 | _ | 7 | |a CERN Lab |2 INSPIRE |
| 650 | _ | 7 | |a density matrix |2 INSPIRE |
| 650 | _ | 7 | |a lepton: pair production |2 INSPIRE |
| 650 | _ | 7 | |a final state: ((n)jet dilepton) |2 INSPIRE |
| 650 | _ | 7 | |a parton |2 INSPIRE |
| 650 | _ | 7 | |a quark antiquark |2 INSPIRE |
| 650 | _ | 7 | |a phase space |2 INSPIRE |
| 650 | _ | 7 | |a experimental results |2 INSPIRE |
| 650 | _ | 7 | |a 13000 GeV-cms |2 INSPIRE |
| 693 | _ | _ | |a LHC |e LHC: CMS |1 EXP:(DE-588)4398783-7 |0 EXP:(DE-H253)LHC-Exp-CMS-20150101 |5 EXP:(DE-H253)LHC-Exp-CMS-20150101 |x 0 |
| 856 | 4 | _ | |u https://arxiv.org/abs/2406.03976 |
| 856 | 4 | _ | |u https://bib-pubdb1.desy.de/record/612173/files/2406.03976v1.pdf |y OpenAccess |
| 856 | 4 | _ | |u https://bib-pubdb1.desy.de/record/612173/files/2406.03976v1.pdf?subformat=pdfa |x pdfa |y OpenAccess |
| 909 | C | O | |o oai:bib-pubdb1.desy.de:612173 |p openaire |p open_access |p VDB |p driver |p dnbdelivery |
| 910 | 1 | _ | |a Deutsches Elektronen-Synchrotron |0 I:(DE-588b)2008985-5 |k DESY |b 0 |6 P:(DE-HGF)0 |
| 913 | 1 | _ | |a DE-HGF |b Forschungsbereich Materie |l Matter and the Universe |1 G:(DE-HGF)POF4-610 |0 G:(DE-HGF)POF4-611 |3 G:(DE-HGF)POF4 |2 G:(DE-HGF)POF4-600 |4 G:(DE-HGF)POF |v Fundamental Particles and Forces |x 0 |
| 914 | 1 | _ | |y 2024 |
| 915 | _ | _ | |a OpenAccess |0 StatID:(DE-HGF)0510 |2 StatID |
| 915 | _ | _ | |a Creative Commons Attribution CC BY 4.0 |0 LIC:(DE-HGF)CCBY4 |2 HGFVOC |
| 915 | _ | _ | |a Published |0 StatID:(DE-HGF)0580 |2 StatID |
| 920 | 1 | _ | |0 I:(DE-H253)CMS-20120731 |k CMS |l LHC/CMS Experiment |x 0 |
| 980 | _ | _ | |a preprint |
| 980 | _ | _ | |a VDB |
| 980 | _ | _ | |a UNRESTRICTED |
| 980 | _ | _ | |a I:(DE-H253)CMS-20120731 |
| 980 | 1 | _ | |a FullTexts |
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