Measurements of top-quark pair spin correlations in the eμ channel at s√=13 TeV using pp collisions in the ATLAS detector

Autores: Aaboud, M.; Aad, G.; Abbott, B.; Abbott, D. C.; Abdinov, O.; Abed Abud, A.; Abhayasinghe, D. K.; Abidi, S. H.; AbouZeid, O. S.; Abraham, N. L.; Abramowicz, H.; Abreu, H.; Abulaiti, Y.; Acharya, B. S.; Adachi, S.; Adam, L.; Adamczyk, L.; Adamek, L.; Adelman, J.; Adersberger, M.; Adiguzel, A.; Adorni, S.; Adye, T.; Aﬀolder, A. A.; Aﬁk, Y.; Agapopoulou, C.; Agaras, M. N.; Aggarwal, A.; Agheorghiesei, C.; Arduh, Francisco Anuar
Año de publicación: 2019
Idioma: inglés
Tipo de recurso: artículo
Estado: versión publicada
Descripción: A measurement of observables sensitive to spin correlations in tt¯ production is presented, using 36.1 fb−1 of pp collision data at s√=13 TeV recorded with the ATLAS detector at the Large Hadron Collider. Differential cross-sections are measured in events with exactly one electron and one muon with opposite-sign electric charge as a function of the azimuthal opening angle and the absolute difference in pseudorapidity between the electron and muon candidates in the laboratory frame. The azimuthal opening angle is also measured as a function of the invariant mass of the tt¯ system. The measured differential cross-sections are compared to predictions by several NLO Monte Carlo generators and fixed-order calculations. The observed degree of spin correlation is significantly higher than predicted by the generators used, but agrees well with the prediction of one of the fixed-order calculations. Using these leptonic observables, a search is performed for pair production of supersymmetric top squarks decaying into Standard Model top quarks and light neutralinos. Top squark masses between 170 and 230 GeV are largely excluded at the 95% confidence level for kinematically allowed values of the neutralino mass.
Fil: Aaboud, M.. Université Mohamed Premier; Marruecos
Fil: Aad, G.. Aix Marseille Université; Francia
Fil: Abbott, B.. Oklahoma State University; Estados Unidos
Fil: Abbott, D. C.. University of Massachusetts; Estados Unidos
Fil: Abdinov, O.. Azerbaijan Academy of Sciences; Azerbaiyán
Fil: Abed Abud, A.. Universita Degli Studi Di Pavia; Italia
Fil: Abhayasinghe, D. K.. Royal Holloway University of London; Reino Unido
Fil: Abidi, S. H.. University of Tokyo; Japón
Fil: AbouZeid, O. S.. University of Copenhagen; Dinamarca
Fil: Abraham, N. L.. University of Sussex; Reino Unido
Fil: Abramowicz, H.. Universitat Tel Aviv; Israel
Fil: Abreu, H.. Technion - Israel Institute of Technology; Israel
Fil: Abulaiti, Y.. Argonne National Laboratory; Estados Unidos
Fil: Acharya, B. S.. Universita Di Udine.; Italia. King’s College London; Reino Unido
Fil: Adachi, S.. University of Tokyo; Japón
Fil: Adam, L.. Johannes Gutenberg Universitat Mainz; Alemania
Fil: Adamczyk, L.. University of Science and Technology; Polonia
Fil: Adamek, L.. University of Toronto; Canadá
Fil: Adelman, J.. Northern Illinois University; Estados Unidos
Fil: Adersberger, M.. Universidad de Múnich; Alemania
Fil: Adiguzel, A.. Bogazici University; Turquía. Istanbul University; Turquía
Fil: Adorni, S.. Universite Ifm Geneve (ifm); Suiza
Fil: Adye, T.. Rutherford Appleton Laboratory; Reino Unido
Fil: Aﬀolder, A. A.. University Of California At Santa Cruz.; Estados Unidos
Fil: Aﬁk, Y.. Technion - Israel Institute of Technology; Israel
Fil: Agapopoulou, C.. Université Paris Sud; Francia. Université Paris Saclay; Francia
Fil: Agaras, M. N.. Université Clermont Auvergne; Francia
Fil: Aggarwal, A.. Radboud University Nijmegen; Países Bajos
Fil: Agheorghiesei, C.. Alexandru Ioan Cuza University of Iasi; Rumania
Fil: Arduh, Francisco Anuar. Cern - European Organization for Nuclear Research; Suiza. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; Argentina
Materia: ATLAS
HIGH ENERGY PHYSICS
Nivel de accesibilidad: acceso abierto
Condiciones de uso: https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
Institución: Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador: oai:ri.conicet.gov.ar:11336/137503

Acceder

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network_name_str	CONICET Digital (CONICET)
spelling	Measurements of top-quark pair spin correlations in the eμ channel at s√=13 TeV using pp collisions in the ATLAS detectorAaboud, M.Aad, G.Abbott, B.Abbott, D. C.Abdinov, O.Abed Abud, A.Abhayasinghe, D. K.Abidi, S. H.AbouZeid, O. S.Abraham, N. L.Abramowicz, H.Abreu, H.Abulaiti, Y.Acharya, B. S.Adachi, S.Adam, L.Adamczyk, L.Adamek, L.Adelman, J.Adersberger, M.Adiguzel, A.Adorni, S.Adye, T.Aﬀolder, A. A.Aﬁk, Y.Agapopoulou, C.Agaras, M. N.Aggarwal, A.Agheorghiesei, C.Arduh, Francisco AnuarATLASHIGH ENERGY PHYSICShttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1A measurement of observables sensitive to spin correlations in tt¯ production is presented, using 36.1 fb−1 of pp collision data at s√=13 TeV recorded with the ATLAS detector at the Large Hadron Collider. Differential cross-sections are measured in events with exactly one electron and one muon with opposite-sign electric charge as a function of the azimuthal opening angle and the absolute difference in pseudorapidity between the electron and muon candidates in the laboratory frame. The azimuthal opening angle is also measured as a function of the invariant mass of the tt¯ system. The measured differential cross-sections are compared to predictions by several NLO Monte Carlo generators and fixed-order calculations. The observed degree of spin correlation is significantly higher than predicted by the generators used, but agrees well with the prediction of one of the fixed-order calculations. Using these leptonic observables, a search is performed for pair production of supersymmetric top squarks decaying into Standard Model top quarks and light neutralinos. Top squark masses between 170 and 230 GeV are largely excluded at the 95% confidence level for kinematically allowed values of the neutralino mass.Fil: Aaboud, M.. Université Mohamed Premier; MarruecosFil: Aad, G.. Aix Marseille Université; FranciaFil: Abbott, B.. Oklahoma State University; Estados UnidosFil: Abbott, D. C.. University of Massachusetts; Estados UnidosFil: Abdinov, O.. Azerbaijan Academy of Sciences; AzerbaiyánFil: Abed Abud, A.. Universita Degli Studi Di Pavia; ItaliaFil: Abhayasinghe, D. K.. Royal Holloway University of London; Reino UnidoFil: Abidi, S. H.. University of Tokyo; JapónFil: AbouZeid, O. S.. University of Copenhagen; DinamarcaFil: Abraham, N. L.. University of Sussex; Reino UnidoFil: Abramowicz, H.. Universitat Tel Aviv; IsraelFil: Abreu, H.. Technion - Israel Institute of Technology; IsraelFil: Abulaiti, Y.. Argonne National Laboratory; Estados UnidosFil: Acharya, B. S.. Universita Di Udine.; Italia. King’s College London; Reino UnidoFil: Adachi, S.. University of Tokyo; JapónFil: Adam, L.. Johannes Gutenberg Universitat Mainz; AlemaniaFil: Adamczyk, L.. University of Science and Technology; PoloniaFil: Adamek, L.. University of Toronto; CanadáFil: Adelman, J.. Northern Illinois University; Estados UnidosFil: Adersberger, M.. Universidad de Múnich; AlemaniaFil: Adiguzel, A.. Bogazici University; Turquía. Istanbul University; TurquíaFil: Adorni, S.. Universite Ifm Geneve (ifm); SuizaFil: Adye, T.. Rutherford Appleton Laboratory; Reino UnidoFil: Aﬀolder, A. A.. University Of California At Santa Cruz.; Estados UnidosFil: Aﬁk, Y.. Technion - Israel Institute of Technology; IsraelFil: Agapopoulou, C.. Université Paris Sud; Francia. Université Paris Saclay; FranciaFil: Agaras, M. N.. Université Clermont Auvergne; FranciaFil: Aggarwal, A.. Radboud University Nijmegen; Países BajosFil: Agheorghiesei, C.. Alexandru Ioan Cuza University of Iasi; RumaniaFil: Arduh, Francisco Anuar. Cern - European Organization for Nuclear Research; Suiza. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; ArgentinaSpringer2019-08-19info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/137503Aaboud, M.; Aad, G. ; Abbott, B.; Abbott, D. C.; Abdinov, O.; et al.; Measurements of top-quark pair spin correlations in the eμ channel at s√=13 TeV using pp collisions in the ATLAS detector; Springer; European Physical Journal C: Particles and Fields; 80; 754; 19-8-2019; 1-641434-6044CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/arxiv/https://arxiv.org/abs/1903.07570info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1140%2Fepjc%2Fs10052-020-8181-6info:eu-repo/semantics/altIdentifier/doi/10.1140/epjc/s10052-020-8181-6info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:43:47Zoai:ri.conicet.gov.ar:11336/137503instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 10:43:47.787CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv	Measurements of top-quark pair spin correlations in the eμ channel at s√=13 TeV using pp collisions in the ATLAS detector
title	Measurements of top-quark pair spin correlations in the eμ channel at s√=13 TeV using pp collisions in the ATLAS detector
spellingShingle	Measurements of top-quark pair spin correlations in the eμ channel at s√=13 TeV using pp collisions in the ATLAS detector Aaboud, M. ATLAS HIGH ENERGY PHYSICS
title_short	Measurements of top-quark pair spin correlations in the eμ channel at s√=13 TeV using pp collisions in the ATLAS detector
title_full	Measurements of top-quark pair spin correlations in the eμ channel at s√=13 TeV using pp collisions in the ATLAS detector
title_fullStr	Measurements of top-quark pair spin correlations in the eμ channel at s√=13 TeV using pp collisions in the ATLAS detector
title_full_unstemmed	Measurements of top-quark pair spin correlations in the eμ channel at s√=13 TeV using pp collisions in the ATLAS detector
title_sort	Measurements of top-quark pair spin correlations in the eμ channel at s√=13 TeV using pp collisions in the ATLAS detector
dc.creator.none.fl_str_mv	Aaboud, M. Aad, G. Abbott, B. Abbott, D. C. Abdinov, O. Abed Abud, A. Abhayasinghe, D. K. Abidi, S. H. AbouZeid, O. S. Abraham, N. L. Abramowicz, H. Abreu, H. Abulaiti, Y. Acharya, B. S. Adachi, S. Adam, L. Adamczyk, L. Adamek, L. Adelman, J. Adersberger, M. Adiguzel, A. Adorni, S. Adye, T. Aﬀolder, A. A. Aﬁk, Y. Agapopoulou, C. Agaras, M. N. Aggarwal, A. Agheorghiesei, C. Arduh, Francisco Anuar
author	Aaboud, M.
author_facet	Aaboud, M. Aad, G. Abbott, B. Abbott, D. C. Abdinov, O. Abed Abud, A. Abhayasinghe, D. K. Abidi, S. H. AbouZeid, O. S. Abraham, N. L. Abramowicz, H. Abreu, H. Abulaiti, Y. Acharya, B. S. Adachi, S. Adam, L. Adamczyk, L. Adamek, L. Adelman, J. Adersberger, M. Adiguzel, A. Adorni, S. Adye, T. Aﬀolder, A. A. Aﬁk, Y. Agapopoulou, C. Agaras, M. N. Aggarwal, A. Agheorghiesei, C. Arduh, Francisco Anuar
author_role	author
author2	Aad, G. Abbott, B. Abbott, D. C. Abdinov, O. Abed Abud, A. Abhayasinghe, D. K. Abidi, S. H. AbouZeid, O. S. Abraham, N. L. Abramowicz, H. Abreu, H. Abulaiti, Y. Acharya, B. S. Adachi, S. Adam, L. Adamczyk, L. Adamek, L. Adelman, J. Adersberger, M. Adiguzel, A. Adorni, S. Adye, T. Aﬀolder, A. A. Aﬁk, Y. Agapopoulou, C. Agaras, M. N. Aggarwal, A. Agheorghiesei, C. Arduh, Francisco Anuar
author2_role	author author author author author author author author author author author author author author author author author author author author author author author author author author author author author
dc.subject.none.fl_str_mv	ATLAS HIGH ENERGY PHYSICS
topic	ATLAS HIGH ENERGY PHYSICS
purl_subject.fl_str_mv	https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv	A measurement of observables sensitive to spin correlations in tt¯ production is presented, using 36.1 fb−1 of pp collision data at s√=13 TeV recorded with the ATLAS detector at the Large Hadron Collider. Differential cross-sections are measured in events with exactly one electron and one muon with opposite-sign electric charge as a function of the azimuthal opening angle and the absolute difference in pseudorapidity between the electron and muon candidates in the laboratory frame. The azimuthal opening angle is also measured as a function of the invariant mass of the tt¯ system. The measured differential cross-sections are compared to predictions by several NLO Monte Carlo generators and fixed-order calculations. The observed degree of spin correlation is significantly higher than predicted by the generators used, but agrees well with the prediction of one of the fixed-order calculations. Using these leptonic observables, a search is performed for pair production of supersymmetric top squarks decaying into Standard Model top quarks and light neutralinos. Top squark masses between 170 and 230 GeV are largely excluded at the 95% confidence level for kinematically allowed values of the neutralino mass. Fil: Aaboud, M.. Université Mohamed Premier; Marruecos Fil: Aad, G.. Aix Marseille Université; Francia Fil: Abbott, B.. Oklahoma State University; Estados Unidos Fil: Abbott, D. C.. University of Massachusetts; Estados Unidos Fil: Abdinov, O.. Azerbaijan Academy of Sciences; Azerbaiyán Fil: Abed Abud, A.. Universita Degli Studi Di Pavia; Italia Fil: Abhayasinghe, D. K.. Royal Holloway University of London; Reino Unido Fil: Abidi, S. H.. University of Tokyo; Japón Fil: AbouZeid, O. S.. University of Copenhagen; Dinamarca Fil: Abraham, N. L.. University of Sussex; Reino Unido Fil: Abramowicz, H.. Universitat Tel Aviv; Israel Fil: Abreu, H.. Technion - Israel Institute of Technology; Israel Fil: Abulaiti, Y.. Argonne National Laboratory; Estados Unidos Fil: Acharya, B. S.. Universita Di Udine.; Italia. King’s College London; Reino Unido Fil: Adachi, S.. University of Tokyo; Japón Fil: Adam, L.. Johannes Gutenberg Universitat Mainz; Alemania Fil: Adamczyk, L.. University of Science and Technology; Polonia Fil: Adamek, L.. University of Toronto; Canadá Fil: Adelman, J.. Northern Illinois University; Estados Unidos Fil: Adersberger, M.. Universidad de Múnich; Alemania Fil: Adiguzel, A.. Bogazici University; Turquía. Istanbul University; Turquía Fil: Adorni, S.. Universite Ifm Geneve (ifm); Suiza Fil: Adye, T.. Rutherford Appleton Laboratory; Reino Unido Fil: Aﬀolder, A. A.. University Of California At Santa Cruz.; Estados Unidos Fil: Aﬁk, Y.. Technion - Israel Institute of Technology; Israel Fil: Agapopoulou, C.. Université Paris Sud; Francia. Université Paris Saclay; Francia Fil: Agaras, M. N.. Université Clermont Auvergne; Francia Fil: Aggarwal, A.. Radboud University Nijmegen; Países Bajos Fil: Agheorghiesei, C.. Alexandru Ioan Cuza University of Iasi; Rumania Fil: Arduh, Francisco Anuar. Cern - European Organization for Nuclear Research; Suiza. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; Argentina
description	A measurement of observables sensitive to spin correlations in tt¯ production is presented, using 36.1 fb−1 of pp collision data at s√=13 TeV recorded with the ATLAS detector at the Large Hadron Collider. Differential cross-sections are measured in events with exactly one electron and one muon with opposite-sign electric charge as a function of the azimuthal opening angle and the absolute difference in pseudorapidity between the electron and muon candidates in the laboratory frame. The azimuthal opening angle is also measured as a function of the invariant mass of the tt¯ system. The measured differential cross-sections are compared to predictions by several NLO Monte Carlo generators and fixed-order calculations. The observed degree of spin correlation is significantly higher than predicted by the generators used, but agrees well with the prediction of one of the fixed-order calculations. Using these leptonic observables, a search is performed for pair production of supersymmetric top squarks decaying into Standard Model top quarks and light neutralinos. Top squark masses between 170 and 230 GeV are largely excluded at the 95% confidence level for kinematically allowed values of the neutralino mass.
publishDate	2019
dc.date.none.fl_str_mv	2019-08-19
dc.type.none.fl_str_mv	info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo
format	article
status_str	publishedVersion
dc.identifier.none.fl_str_mv	http://hdl.handle.net/11336/137503 Aaboud, M.; Aad, G. ; Abbott, B.; Abbott, D. C.; Abdinov, O.; et al.; Measurements of top-quark pair spin correlations in the eμ channel at s√=13 TeV using pp collisions in the ATLAS detector; Springer; European Physical Journal C: Particles and Fields; 80; 754; 19-8-2019; 1-64 1434-6044 CONICET Digital CONICET
url	http://hdl.handle.net/11336/137503
identifier_str_mv	Aaboud, M.; Aad, G. ; Abbott, B.; Abbott, D. C.; Abdinov, O.; et al.; Measurements of top-quark pair spin correlations in the eμ channel at s√=13 TeV using pp collisions in the ATLAS detector; Springer; European Physical Journal C: Particles and Fields; 80; 754; 19-8-2019; 1-64 1434-6044 CONICET Digital CONICET
dc.language.none.fl_str_mv	eng
language	eng
dc.relation.none.fl_str_mv	info:eu-repo/semantics/altIdentifier/arxiv/https://arxiv.org/abs/1903.07570 info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1140%2Fepjc%2Fs10052-020-8181-6 info:eu-repo/semantics/altIdentifier/doi/10.1140/epjc/s10052-020-8181-6
dc.rights.none.fl_str_mv	info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv	openAccess
rights_invalid_str_mv	https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv	application/pdf application/pdf
dc.publisher.none.fl_str_mv	Springer
publisher.none.fl_str_mv	Springer
dc.source.none.fl_str_mv	reponame:CONICET Digital (CONICET) instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str	CONICET Digital (CONICET)
collection	CONICET Digital (CONICET)
instname_str	Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv	CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv	dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score	13.070432

Measurements of top-quark pair spin correlations in the eμ channel at s√=13 TeV using pp collisions in the ATLAS detector

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