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Study of chi(cJ) decaying into phi K*(892)(K)over-bar
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2015 (English)In: Physical Review D, ISSN 1550-7998, E-ISSN 1550-2368, Vol. 91, no 11, 112008Article in journal (Refereed) Published
Abstract [en]

Using a data sample of 106 million psi(3686) events collected with the BESIII detector operated at the BEPCII storage ring, we study for the first time the decays chi(cJ) -> phi(KSK +/-)-K-0 pi(-/+) and chi(cJ) -> phi K+K-pi(0) in the E1 radiative transition psi(3686) -> gamma chi(cJ). The decays are dominated by the three-body decay chi(cJ) -> phi K*(892)(K) over bar. We measure branching fractions for this reaction via the neutral and charged K*(892) and find them consistent with each other within the expectation of isospin symmetry. In the K (K) over bar pi invariant mass distribution, a structure near the K*(892)(K) over bar mass threshold is observed, and the corresponding mass and width are measured to be 1412 +/- 4(stat) +/- 8(sys) MeV/c(2) and Gamma = 84 +/- 12(stat) +/- 40(sys) MeV, respectively. The observed state favors an assignment to the h(1)(1380), considering its possible J(PC) and comparing its mass, width and decay mode to those reported in the Particle Data Group.

Place, publisher, year, edition, pages
2015. Vol. 91, no 11, 112008
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Physical Sciences
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URN: urn:nbn:se:uu:diva-258339DOI: 10.1103/PhysRevD.91.112008ISI: 000356216700001OAI: oai:DiVA.org:uu-258339DiVA: diva2:841593
Available from: 2015-07-14 Created: 2015-07-13 Last updated: 2017-12-04Bibliographically approved

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Johansson, TordKupsc, A.

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