| Title: |
Characterization of the quantum state of top quark pairs produced in proton-proton collisions at s = 13 TeV using the beam and helicity bases |
| Authors: |
Hayrapetyan, A.; Makarenko, V.; Tumasyan, A.; Adam, W.; Benato, L.; Bergauer, T.; Dragicevic, M.; Hussain, P. S.; Jeitler, M.; Krammer, N.; Li, A.; Liko, D.; Matthewman, M.; Schieck, J.; Schöfbeck, R.; Shooshtari, M.; Sonawane, M.; Waltenberger, W.; Wulz, C.-E.; Janssen, T.; Kwon, H.; Ocampo Henao, D.; Van Laer, T.; Van Mechelen, P.; Bierkens, J.; Breugelmans, N.; D’Hondt, J.; Dansana, S.; De Moor, A.; Delcourt, M.; Heyen, F.; Hong, Y.; Kashko, P.; Lowette, S.; Makarenko, I.; Müller, D.; Tavernier, S.; Tytgat, M.; Van Onsem, G. P.; Van Putte, S.; Vannerom, D.; Bilin, B.; Clerbaux, B.; Das, A. K.; De Bruyn, I.; De Lentdecker, G.; Evard, H.; Favart, L.; Gianneios, P.; Khalilzadeh, A. |
| Contributors: |
Bundesministerium für Bildung und Frauen; Austrian Science Fund; Fonds De La Recherche Scientifique—FNRS; Fonds Wetenschappelijk Onderzoek; Conselho Nacional de Desenvolvimento Científico e Tecnológico; Coordenação de Aperfeiçoamento de Pessoal de Nível Superior; Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro; Fundação de Amparo à Pesquisa do Estado do Rio Grande do Sul; Fundação de Amparo à Pesquisa do Estado de São Paulo; Ministry of Education and Science; Bulgarian National Science Fund; CERN; Chinese Academy of Sciences; Ministry of Science and Technology of the People’s Republic of China; National Natural Science Foundation of China; Ministarstvo znanosti i obrazovanja; Hrvatska Zaklada za Znanost; Secretaría de Educación Superior, Ciencia, Tecnología e Innovación; European Research Council; Academy of Finland; Commissariat à l’Énergie Atomique et aux Énergies Alternatives; Centre National de la Recherche Scientifique; Institut National de Physique Nucléaire et de Physique des Particules; Shota Rustaveli National Science Foundation; Bundesministerium für Bildung, Wissenschaft und Forschung; Deutsche Forschungsgemeinschaft; Helmholtz-Gemeinschaft; Nemzeti Kutatási Fejlesztési és Innovációs Hivatal; Department of Atomic Energy, Government of India; Department of Science and Technology, Ministry of Science and Technology, India; Institute for Research in Fundamental Sciences; Science Foundation Ireland; Instituto Nazionale di Fisica Nucleare; Ministry of Science, ICT and Future Planning; National Research Foundation of Korea; Izglītības un zinātnes ministrija; Kementerian Pendidikan Malaysia; Universiti Malaya; Benemérita Universidad Autónoma de Puebla; Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional; Consejo Nacional de Ciencia y Tecnología; Laboratorio Nacional de Supercómputo del Sureste de Mexico; Secretaría de Educación Pública; Universidad Autónoma de San Luis Potosí; Ministry for Business Innovation and Employment; Pakistan Atomic Energy Commission; Narodowe Centrum Nauki; Fundação para a Ciência e a Tecnologia; Ministerio de Ciencia, Innovación y Universidades; Agencia Estatal de Investigación; Ministry of Science, Technology and Research; Ministry of Higher Education, Science, Research and Innovation, Thailand; National Science and Technology Development Agency; Türkiye Bilimsel ve Teknolojik Araştırma Kurumu; Türkiye Enerji, Nükleer ve Maden Araştırma Kurumu; National Academy of Sciences of Ukraine; Science and Technology Facilities Council; U.S. Department of Energy; National Science Foundation; Marie Curie; Horizon 2020 Framework Programme; European Cooperation in Science and Technology; A.G. Leventis Foundation; Alfred P. Sloan Foundation; Alexander von Humboldt-Stiftung; Fonds pour la Formation à la Recherche dans l’Industrie et dans l’Agriculture; Beijing Municipal Science and Technology Commission, Adminitrative Commission of Zhongguancun Science Park; Fundamental Research Funds for the Central Universities; University of Science and Technology of China; Ministerstvo Školství, Mládeže a Tělovýchovy; Hellenic Foundation for Research and Innovation; Magyar Tudományos Akadémia; Council of Scientific and Industrial Research, India; NextGenerationEU; Latvijas Zinātnes Padome; Ministerstwo Edukacji i Nauki; Narodowa Agencja Wymiany Akademickiej; Qatar National Research Fund; European Regional Development Fund; European Commission; Nemzeti Kutatási, Fejlesztési és Innovaciós Alap; Kavli Foundation; Nvidia; Welch Foundation; Weston Havens Foundation; Université Catholique de Louvain; Universidade do Estado do Rio de Janeiro; Institute of High Energy Physics; National Institute of Chemical Physics and Biophysics, Tallinn; Deutsches Elektronen-Synchrotron; Karlsruhe Institute of Technology; RWTH Aachen University; University of Ioannina; Wigner Fizikai Kutatóközpont, Magyar Tudományos Akadémia; Tata Institute of Fundamental Research; Kyungpook National University; Quaid-i-Azam University; Joint Institute for Nuclear Research; Korea Institute of Science and Technology Information; Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas; Instituto de Física de Cantabria; Centro Svizzero di Calcolo Scientifico; Orta Doğu Teknik Üniversitesi; Brunel University London; Imperial College London; Queen Mary University of London; Royal Holloway, University of London; Rutherford Appleton Laboratory; University of Bristol; University of Glasgow; University of Oxford; Baylor University; California Institute of Technology; Fermilab; Massachusetts Institute of Technology; National Energy Research Scientific Computing Center; Purdue University; San Diego Supercomputer Center; University of California, San Diego; University of Colorado Boulder; University of Florida; University of Nebraska-Lincoln; University of Wisconsin-Madison; Vanderbilt University; SC, Armenia; MINCIENCIAS, Colombia; RIF, Cyprus; RVTT3; MoER TK202; MEC, Finland; HIP, Finland; GSRI, Greece; LMTLT, Lithuania; MOS, Montenegro; MES, Poland; MESTD, Serbia; PCTI, Spain; Swiss Funding Agencies, Switzerland; MST, Taipei; Germany’s Excellence Strategy; New National Excellence Program—ÚNKP; ICSC—National Research Center for High Performance Computing, Big Data and Quantum Computing; FAIR—Future Artificial Intelligence Research; Programa Severo Ochoa del Principado de Asturias, Spain; Chulalongkorn Academic; Program Management Unit for Human Resources & Institutional Development, Research and Innovation, Thailand; SuperMicro Corporation; Institut für Hochenergiephysik (HEPHY) using the Cloud Infrastructure Platform (CLIP), Vienna; Inter-University Institute for High Energies; São Paulo Research and Analysis Center, São Paulo; Helsinki Institute of Physics; Grille de Recherche d’Ile de France; Institut de recherche sur les lois fondamentales de l’Univers, CEA, Université Paris-Saclay; Institut Pluridisciplinaire Hubert Curien; Laboratoire Leprince-Ringuet, CNRS/IN2P3, Ecole Polytechnique, Institut Polytechnique de Paris; INFN CNAF, Bologna; INFN Sezione di Bari, Università di Bari, Politecnico di Bari, Bari; INFN Sezione di Pisa, Università di Pisa, Scuola Normale Superiore di Pisa, Pisa; INFN Sezione di Roma, Sapienza Università di Roma, Rome; INFN Sezione di Trieste, Università di Trieste, Trieste; Laboratori Nazionali di Legnaro; Akademickie Centrum Komputerowe Cyfronet AGH, Krakow; National Centre for Nuclear Research; Laboratório de Instrumentação e Física Experimental de Partículas; Institute for High Energy Physics of National Research Centre “Kurchatov Institute”; A.I. Alikhanov of NRC “Kurchatov Institute”; Port d’Informació Científica; National Center for High-performance Computing; National Scientific Center, Kharkov Institute of Physics and Technology; Chulalongkorn Academic into Its 2nd Century Project Advancement Project; National Science, Research and Innovation Fund; Institute for High Energy Physics of National Research Centre ‘Kurchatov Institute’; A.I. Alikhanov of NRC ‘Kurchatov Institute’; Open Science Grid (OSG) Consortium; Pittsburgh Supercomputing Center; Texas Advanced Computing Center |
| Source: |
Physical Review D ; volume 113, issue 5 ; ISSN 2470-0010 2470-0029 |
| Publisher Information: |
American Physical Society (APS) |
| Publication Year: |
2026 |
| Description: |
Measurements of the spin correlation coefficients in the beam basis are presented for top quark-antiquark ( ) systems produced in proton-proton collisions at collected by the CMS experiment in 2016–2018, and corresponding to an integrated luminosity of . The system is reconstructed from final states containing an electron or muon and jets. Together with the previously reported results in the helicity basis, these measurements are used to decompose the system into the Bell and spin eigenstates in various kinematic regions. The spin correlation coefficients are also used to evaluate properties of the quantum state, such as the purity, von Neumann entropy, and entanglement. All results are consistent with standard model predictions. |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| DOI: |
10.1103/hkgw-dztk |
| DOI: |
10.1103/hkgw-dztk/fulltext |
| Availability: |
https://doi.org/10.1103/hkgw-dztk; https://link.aps.org/article/10.1103/hkgw-dztk; http://harvest.aps.org/v2/journals/articles/10.1103/hkgw-dztk/fulltext |
| Rights: |
https://creativecommons.org/licenses/by/4.0/ |
| Accession Number: |
edsbas.E5A2EF45 |
| Database: |
BASE |