Amplitude Analysis of the Decays η′ → π⁺π⁻π⁰ and η′ → π⁰π⁰π⁰

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dc.contributor.ORCID0000-0003-0867-2189 (Lou, X)en_US
dc.contributor.authorAblikim, M.en_US
dc.contributor.authorAchasov, M. N.en_US
dc.contributor.authorAi, X. C.en_US
dc.contributor.authorAlbayrak, O.en_US
dc.contributor.authorAlbrecht, M.en_US
dc.contributor.authorAmbrose, D. J.en_US
dc.contributor.authorAmoroso, A.en_US
dc.contributor.authorLou, Xinchouen_US
dc.contributor.authorBESIII Collaborationen_US
dc.contributor.utdAuthorLou, Xinchouen_US
dc.date.accessioned2018-05-24T18:18:20Z
dc.date.available2018-05-24T18:18:20Z
dc.date.created2017-01-06en_US
dc.date.issued2017-01-06en_US
dc.description.abstractBased on a sample of 1.31 x 10⁹ J/ψ events collected with the BESIII detector, an amplitude analysis of the isospin-violating decays η′ → π⁺π⁻π⁰ and η′ → π⁰π⁰π⁰ is performed. A significant P-wave contribution from η′ → ρ^{±} π^{∓} is observed for the first time in η′ → π⁺π⁻π⁰. The branching fraction is determined to be ℬ(η′ → ρ^{±} π^{∓}) = (7.44 ± 0.60 ± 1.26 ± 1.84) x 10⁻⁴, where the first uncertainty is statistical, the second systematic, and the third model dependent. In addition to the nonresonant S-wave component, there is a significant σ meson component. The branching fractions of the combined S-wave components are determined to be ℬ(η′ → π⁺π⁻π⁰)s = (37.63 ± 0.77 ± 2.22 ± 4.48) x 10⁻⁴ and ℬ(η′ → π⁰π⁰π⁰) = (35.22 ± 0.82 ± 2.54) x 10⁻⁴, respectively. The latter one is consistent with previous BESIII measurements.en_US
dc.description.departmentSchool of Natural Sciences and Mathematicsen_US
dc.identifier.bibliographicCitationAblikim, M., M. N. Achasov, X. C. Ai, O. Albayrak, et al. 2017. "Amplitude Analysis of the Decays η′ → π⁺π⁻π⁰ and η′ → π⁰π⁰π⁰." Physical Review Letters 118(1), doi:10.1103/PhysRevLett.118.012001en_US
dc.identifier.issn0031-9007en_US
dc.identifier.issue1en_US
dc.identifier.urihttp://hdl.handle.net/10735.1/5760
dc.identifier.volume118en_US
dc.language.isoenen_US
dc.publisherAmerican Physical Societyen_US
dc.relation.urihttp://dx.doi.org/10.1103/PhysRevLett.118.012001
dc.rights©2017 American Physical Society. All Rights Reserved.en_US
dc.sourcePhysical Review Letters
dc.subjectHadron interactionsen_US
dc.subjectHadrons—Decayen_US
dc.subjectField theory (Physics)en_US
dc.subjectQuantum field theoryen_US
dc.subjectSeismic wavesen_US
dc.subjectBranching fractions (Nuclear physics)en_US
dc.subjectIsobaric spinen_US
dc.subjectShear wavesen_US
dc.titleAmplitude Analysis of the Decays η′ → π⁺π⁻π⁰ and η′ → π⁰π⁰π⁰en_US
dc.type.genrearticleen_US

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