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Study of J/psi and psi(3686) -> Sigma(1385)(0)(Sigma)over-bar(1385)(0) and Xi(0)(Xi)over-bar(0): Study of J/ψ and ψ(3686) → (1385)0( ¯ 1385)0 and 0¯ 0
Inst High Energy Phys, Beijing 100049, Peoples R China..
G I Budker Inst Nucl Phys SB MS BINP, Novosibirsk 630090, Russia.;Novosibirsk State Univ, Novosibirsk 630090, Russia..
Helmholtz Inst Mainz, Johann Joachim Becher Weg 45, D-55099 Mainz, Germany..
Inst High Energy Phys, Beijing 100049, Peoples R China..
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2017 (English)In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 770, p. 217-225Article in journal (Refereed) Published
Abstract [en]

We study the decays of J/psi and psi(3686) to the final states Sigma(1385)(0)(Sigma) over bar (1385)(0) and Xi(0)(Xi) over bar (0) based on a single baryon tag method using data samples of (1310.6 +/- 7.0) x 10(6) J/psi and (447.9 +/- 2.9) x 10(6) psi(3686) events collected with the BESIII detector at the BEPCII collider. The decays to Sigma(1385)(0)(Sigma) over bar (1385)(0) are observed for the first time. The measured branching fractions of J/psi and psi(3686) to Xi(0)(Xi) over bar (0) are in good agreement with, and much more precise than, the previously published results. The angular parameters for these decays are also measured for the first time. The measured angular decay parameter for J/psi -> Sigma(1385)(0)(Sigma) over bar (1385)(0), alpha = -0.64 +/- 0.03 +/- 0.10, is found to be negative, different to the other decay processes in this measurement. In addition, the "12% rule" and isospin symmetry in the decays of J/psi and psi(3686) to Xi(Xi) over bar and Sigma(1385)(Sigma) over bar (1385) are tested.

Place, publisher, year, edition, pages
ELSEVIER SCIENCE BV , 2017. Vol. 770, p. 217-225
Keywords [en]
Charmonium, Branching fraction, Angular distribution
National Category
Astronomy, Astrophysics and Cosmology Physical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-329931DOI: 10.1016/j.physletb.2017.04.048ISI: 000404196500031OAI: oai:DiVA.org:uu-329931DiVA, id: diva2:1184884
Funder
German Research Foundation (DFG), CRC 1044; FOR 2359
Note

BESIII Collaboration

Available from: 2018-02-22 Created: 2018-02-22 Last updated: 2018-02-22Bibliographically approved

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Andersson, Walter IkegamiJohansson, TordKupsc, AndrzejLi, CuiPettersson, JoachimSchönning, KarinWolke, Magnus

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