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dc.date.accessioned 2022-02-16T19:00:09Z
dc.date.available 2022-02-16T19:00:09Z
dc.date.issued 2012-05
dc.identifier.uri http://sedici.unlp.edu.ar/handle/10915/131228
dc.description.abstract A measurement of spin correlation in tt̄ production is reported using data collected with the ATLAS detector at the LHC, corresponding to an integrated luminosity of 2.1 fb⁻¹. Candidate events are selected in the dilepton topology with large missing transverse energy and at least two jets. The difference in azimuthal angle between the two charged leptons in the laboratory frame is used to extract the correlation between the top and antitop quark spins. In the helicity basis the measured degree of correlation corresponds to Ahelicity = 0.40+0:09-0.08, in agreement with the next-to-leading-order standard model prediction. The hypothesis of zero spin correlation is excluded at 5.1 standard deviations. en
dc.language en es
dc.subject Top quarks es
dc.subject Experimental tests es
dc.subject Inclusive production with identified leptons, photons, or other nonhadronic particles es
dc.title Observation of spin correlation in tt̄ events from pp collisions at √s = 7 TeV Using the ATLAS detector en
dc.type Articulo es
sedici.identifier.other doi:10.1103/physrevlett.108.212001 es
sedici.identifier.other pmid:23003244 es
sedici.identifier.issn 1079-7114 es
sedici.identifier.issn 0031-9007 es
sedici.creator.person Anduaga, Xabier Sebastián es
sedici.creator.person Dova, María Teresa es
sedici.creator.person Monticelli, Fernando Gabriel es
sedici.creator.person Tripiana, Martín Fernando es
sedici.creator.corporate The ATLAS Collaboration es
sedici.description.note La lista completa de autores que integran el documento puede consultarse en el archivo. es
sedici.subject.materias Ciencias Exactas es
sedici.subject.materias Física es
sedici.description.fulltext true es
mods.originInfo.place Facultad de Ciencias Exactas es
mods.originInfo.place Instituto de Física La Plata es
sedici.subtype Articulo es
sedici.rights.license Creative Commons Attribution 3.0 Unported (CC BY 3.0)
sedici.rights.uri http://creativecommons.org/licenses/by/3.0/
sedici.description.peerReview peer-review es
sedici.relation.journalTitle Physical Review Letters es
sedici.relation.journalVolumeAndIssue vol. 108, no. 21 es


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Creative Commons Attribution 3.0 Unported (CC BY 3.0) Except where otherwise noted, this item's license is described as Creative Commons Attribution 3.0 Unported (CC BY 3.0)