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Observation of Spin Correlation in t(t)over-bar Events from pp Collisions at root s=7 TeV Using the ATLAS Detector

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Observation of Spin Correlation in t(t)over-bar Events from pp Collisions at root s=7 TeV Using the ATLAS Detector

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dc.contributor.author	ATLAS Collaboration
dc.contributor.author	Mitsou, Vasiliki
dc.contributor.author	Fuster Verdú, Juan A.
dc.contributor.author	Ferrer Soria, Antonio
dc.contributor.author	Castillo Giménez, María Victoria
dc.contributor.author	Cabrera Urbán, Susana
dc.contributor.author	García García, Carmen
dc.contributor.author	Higón Rodríguez, Emilio
dc.contributor.author	Martí García, Salvador
dc.contributor.author	Ros Martínez, Eduardo
dc.contributor.author	González de la Hoz, Santiago
dc.contributor.author	Salt Cairols, José
dc.contributor.author	Valls Ferrer, Juan Antonio
dc.contributor.author	Kaci, Mohammed
dc.contributor.author	Fiorini, Luca
dc.contributor.author	Hernández Jiménez, Yesenia
dc.contributor.author	Lacasta Llácer, Carlos
dc.contributor.author	Villaplana Pérez, Miguel
dc.date.accessioned	2014-06-17T08:54:26Z
dc.date.available	2014-06-17T08:54:26Z
dc.date.issued	2012
dc.identifier.citation	ATLAS Collaboration Mitsou, Vasiliki Fuster Verdú, Juan A. Ferrer Soria, Antonio Castillo Giménez, María Victoria Cabrera Urbán, Susana García García, Carmen Higón Rodríguez, Emilio Martí García, Salvador Ros Martínez, Eduardo González de la Hoz, Santiago Salt Cairols, José Valls Ferrer, Juan Antonio Kaci, Mohammed Fiorini, Luca Hernández Jiménez, Yesenia Lacasta Llácer, Carlos Villaplana Pérez, Miguel 2012 Observation of Spin Correlation in t(t)over-bar Events from pp Collisions at root s=7 TeV Using the ATLAS Detector Physical Review Letters 108 21-212001 1 19
dc.identifier.uri	http://hdl.handle.net/10550/36191
dc.description.abstract	A measurement of spin correlation in t (t) over bar 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 A(helicity) = 0.40(-0.08)(+0.09), in agreement with the next-to-leading-order standard model prediction. The hypothesis of zero spin correlation is excluded at 5.1 standard deviations.
dc.relation.ispartof	Physical Review Letters, 2012, vol. 108, num. 21-212001, p. 1-19
dc.subject	Partícules (Física nuclear)
dc.subject	Col·lisions (Física nuclear)
dc.subject	Detectors de radiació
dc.title	Observation of Spin Correlation in t(t)over-bar Events from pp Collisions at root s=7 TeV Using the ATLAS Detector
dc.type	journal article	es_ES
dc.date.updated	2014-06-17T08:54:26Z
dc.identifier.doi	10.1103/PhysRevLett.108.212001
dc.identifier.idgrec	083419
dc.rights.accessRights	open access	es_ES
dc.identifier.url	10.1103/PhysRevLett.108.212001