Observation of Time-Reversal Violation in the B⁰ Meson System

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dc.contributor.VIAF250674117 (Izen, JM)en_US
dc.contributor.VIAF250674117 (Izen, JM)
dc.contributor.authorLees, J. P.en_US
dc.contributor.authorPoireau, V.en_US
dc.contributor.authorTisserand, V.en_US
dc.contributor.authorGrauges, E.en_US
dc.contributor.authorPalano, A.en_US
dc.contributor.authorEigen, G.en_US
dc.contributor.authorIzen, Joseph M.en_US
dc.contributor.authorLou, Xinchouen_US
dc.contributor.authorBaBar Collaborationen_US
dc.contributor.utdAuthorLou, Xinchouen_US
dc.contributor.utdAuthorIzen, Joseph M.en_US
dc.date.accessioned2013-01-15T17:33:16Z
dc.date.available2013-01-15T17:33:16Z
dc.date.created2012-07-24en_US
dc.date.issued2012-11-19en_US
dc.description.abstractAlthough 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 B̄⁰), and J/ψK_L⁰ or cc̄K_S⁰ final states (referred to as B₊ or B₋), allow comparisons between the probabilities of four pairs of T-conjugated transitions, for example, B̅⁰ → B₋ and B₋ → B̅⁰, as a function of the time difference between the two B decays. Using 468 × 10⁶ BB̄ 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.en_US
dc.description.versionFinal published versionen_US
dc.identifier.bibliographicCitationLees, J., V. Poireau, V. Tisserand, J. Garra Tico, E. Grauges, A. Palano, G. Eigen, et al. “Observation of Time-Reversal Violation in the B⁰ Meson System.” Physical Review Letters 109(21), doi:10.1103/PhysRevLett.109.211801.en_US
dc.identifier.issue21en_US
dc.identifier.urihttp://hdl.handle.net/10735.1/2499
dc.identifier.volume109en_US
dc.language.isoen_USen_US
dc.publisherAmerican Physical Societyen_US
dc.relation.urihttp://dx.doi.org/10.1103/PhysRevLett.109.211801
dc.rights©2012 American Physical Societyen_US
dc.sourcePhysical Review Letters
dc.subjectSupersymmetry.en_US
dc.subjectTellurium compoundsen_US
dc.titleObservation of Time-Reversal Violation in the B⁰ Meson Systemen_US
dc.typeTexten_US
dc.type.genreArticleen_US

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