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2008-07-10

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Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/139351

Evidence for CP Violation in B0→J/ψπ0 Decays

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https://doi.org/10.1103/PhysRevLett.101.021801

Abstract

We present measurements of the branching fraction and time-dependent C P asymmetries in B 0 → J / ψ π 0 decays based on 466 × 10 6 Υ ( 4 S ) → B ¯¯¯ B events collected with the BABAR detector at the SLAC PEP-II asymmetric-energy B factory. We measure the C P asymmetry parameters S = − 1.23 ± 0.21 ( stat ) ± 0.04 ( syst ) and C = − 0.20 ± 0.19 ( stat ) ± 0.03 ( syst ) , where the measured value of ( S , C ) is 4.0 standard deviations from (0, 0) including systematic uncertainties. The branching fraction is determined to be B ( B 0 → J / ψ π 0 ) = [ 1.69 ± 0.14 ( stat ) ± 0.07 ( syst ) ] × 10 − 5 .

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Física de partícules, Experiments

Subject (English)

Particle physics, Experiments

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Articles publicats en revistes (Física Quàntica i Astrofísica)

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GARRA TICÓ, Jordi, GRAUGÉS POUS, Eugeni and BABAR Collaboration. Evidence for CP Violation in B0→J/ψπ0 Decays. Physical Review Letters. 2008. Vol. 101, num. 2, pags. 021801. ISSN 0031-9007. [consulted: 12 of August of 2026]. Available at: https://hdl.handle.net/2445/139351

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