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Observation of Time-Reversal Violation in the B-0 Meson System

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Observation of Time-Reversal Violation in the B-0 Meson System

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dc.contributor.author	BABAR Collaboration
dc.contributor.author	Bernabeu Alberola, José
dc.contributor.author	Martínez Vidal, Fernando
dc.contributor.author	Oyanguren Campos, Arantza
dc.contributor.author	Villanueva Pérez, Pablo
dc.date.accessioned	2016-05-04T07:43:28Z
dc.date.available	2016-05-04T07:43:28Z
dc.date.issued	2012
dc.identifier.citation	BABAR Collaboration; Bernabeu Alberola, José; Martínez Vidal, Fernando; Oyanguren Campos, Arantza; Villanueva Pérez, Pablo (2012) Observation of Time-Reversal Violation in the B-0 Meson System Physical Review Letters 109 21 211801-1 211801-8
dc.identifier.uri	http://hdl.handle.net/10550/53351
dc.description.abstract	Although CP violation in the B meson system has been well established by the B factories, there has been no direct observation of time reversal violation. The decays of entangled neutral B mesons into definite flavor states (B0 or B¯0), and J/ψK0S or cc¯K0S final states (referred to as B+ or B−), allow comparisons between the probabilities of four pairs of T-conjugated transitions, for example, B¯0→B− and B−→B¯0, as a function of the time difference between the two B decays. Using 468 million BB¯ pairs produced in Υ(4S) decays collected by the BABAR detector at SLAC, we measure T-violating parameters in the time evolution of neutral B mesons, yielding ΔS+T=−1.37±0.14(stat.)±0.06(syst.) and ΔS−T=1.17±0.18(stat.)±0.11(syst.). These nonzero results represent the first direct observation of T violation through the exchange of initial and final states in transitions that can only be connected by a T-symmetry transformation.
dc.language.iso	eng
dc.relation.ispartof	Physical Review Letters, 2012, vol. 109, num. 21, p. 211801-1-211801-8
dc.subject	Física
dc.title	Observation of Time-Reversal Violation in the B-0 Meson System
dc.type	journal article	es_ES
dc.date.updated	2016-05-04T07:43:28Z
dc.identifier.doi	10.1103/PhysRevLett.109.211801
dc.identifier.idgrec	083521
dc.rights.accessRights	open access	es_ES