Amplitude Analysis of the χ_{c1} → ηπ⁺π⁻ Decays

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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.authorAhmed, S.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.authorLou, Xinchouen_US
dc.contributor.authorBESIII Collaborationen_US
dc.contributor.utdAuthorLou, Xinchouen_US
dc.date.accessioned2018-05-24T18:18:17Z
dc.date.available2018-05-24T18:18:17Z
dc.date.created2017-02-13en_US
dc.date.issued2018-05-24
dc.description.abstractUsing 448.0 x 10⁶ ψ(3686) events collected with the BESIII detector, an amplitude analysis is performed for ψ(3686)→γχ_{c1}, χ_{c1} → ηπ⁺π⁻ decays. The most dominant two-body structure observed is α₀(980)^± π^∓; α₀(980)^±→ηπ^±. The α₀(980) line shape is modeled using a dispersion relation, and a significant nonzero α₀(980) coupling to the η′π channel is measured. We observe χ_{c1} → α₂(1700)π production for the first time, with a significance larger than 17σ. The production of mesons with exotic quantum numbers, J^{PC} = 1⁻⁺, is investigated, and upper limits for the branching fractions χ_{c1}→π₁(1400)^±π^∓, χ_{c1} → π₁(1600)^±π^∓, and χ_{c1} → π₁(2015)^±π^∓, with subsequent π₁(X)^± → ηπ^± decay, are determined.en_US
dc.description.departmentSchool of Natural Sciences and Mathematicsen_US
dc.description.sponsorshipNational Key Basic Research Program of China (2015CB856700); National Natural Science Foundation of China (NSFC) (11235011, 11322544, 11335008, 11425524); NSFC and Chinese Academy of Sciences (CAS) (U1232201, U1332201; U1532258); CAS (KJCX2-YW-N29, KJCX2-YW-N45); Koninklijke Nederlandse Akademie van Wetenschappen (KNAW) (530-4CDP03); Ministry of Development of Turkey (DPT2006K-120470); U.S. Department of Energy (DE-FG02-05ER41374, DE-SC-0010504, DE-SC0012069); National Research Foundation of Korea (R32-2008-000-10155-0).en_US
dc.identifier.bibliographicCitationAblikim, M., M. N. Achasov, S. Ahmed, X. C. Ai, et al. 2017. "Amplitude analysis of the χ_{c1} → ηπ⁺π⁻ decays." Physical Review D 95(3, doi:http://dx.doi.org/10.1103/PhysRevD.95.032002en_US
dc.identifier.issue3en_US
dc.identifier.urihttp://hdl.handle.net/10735.1/5751
dc.identifier.volume95en_US
dc.relation.urihttp://dx.doi.org/10.1103/PhysRevD.95.032002
dc.rights©2017 American Physical Society. All Rights Reserved.en_US
dc.sourcePhysical Review D
dc.subjectBranching fractions (Nuclear physics)en_US
dc.subjectHadrons—Decayen_US
dc.subjectCollisions (Nuclear physics)en_US
dc.subjectMesonsen_US
dc.titleAmplitude Analysis of the χ_{c1} → ηπ⁺π⁻ Decaysen_US
dc.type.genrearticleen_US

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