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First observations of h(c )-> hadrons
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
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Number of Authors: 4852019 (English)In: Physical Review D: covering particles, fields, gravitation, and cosmology, ISSN 2470-0010, E-ISSN 2470-0029, Vol. 99, no 7, article id 072008Article in journal (Refereed) Published
Abstract [en]

Based on (4.48 +/- 0.03) x 10(8) Psi(3686) events, collected with the BESIII detector at the BEPCII storage ring, five h(c) hadronic decays are searched for via the process Psi(3686) -> pi(0)h(c). Three of them, h(c) -> p (p) over bar pi(+)pi(-) , pi(+)pi(-)pi(0 )and 2(pi(+)pi(-))pi(0) are observed for the first time with significances of 7.4 sigma, 4.6 sigma, and 9.1 sigma, and their branching fractions are determined to be (2.89 +/- 0.32 +/- 0.55) x 10(-3), (1.60 +/- 0.40 +/- 0.32) x 10(-3), and (7.44 +/- 0.94 +/- 1.52) x 10(-3), respectively, where the first uncertainties are statistical and the second systematic. No significant signal is observed for the other two decay modes, and the corresponding upper limits of the branching fractions are determined to be B(h(c) -> 3(pi(+)pi(-))pi(0)) < 8.7 x 10(-3) and B(h(c) -> K+K-pi(+)pi(-) ) < 5.8 x 10(-4) at the 90% confidence level.

Place, publisher, year, edition, pages
AMER PHYSICAL SOC , 2019. Vol. 99, no 7, article id 072008
National Category
Subatomic Physics
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URN: urn:nbn:se:uu:diva-383854DOI: 10.1103/PhysRevD.99.072008ISI: 000466419600001OAI: oai:DiVA.org:uu-383854DiVA, id: diva2:1317853
Funder
Knut and Alice Wallenberg Foundation, 2016.0157Swedish Research CouncilGerman Research Foundation (DFG), CRC 1044
Note

For complete list of authors see http://dx.doi.org/10.1103/PhysRevD.99.072008

Available from: 2019-05-24 Created: 2019-05-24 Last updated: 2019-05-24Bibliographically approved

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Adlarson, PatrikBiernat, JacekIkegami Andersson, WalterJohansson, TordKupsc, AndrzejLi, CuiPapenbrock, MichaelPettersson, JoachimSchönning, KarinThorén, ViktorWolke, Magnus
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