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Observation and Spin-Parity Determination of the X(1835) in J/psi -> gamma(KSKS0)-K-0 eta
Inst High Energy Phys, Beijing 100049, Peoples R China..
GI Budker Inst Nucl Phys SB RAS BINP, Novosibirsk 630090, Russia..
Inst High Energy Phys, Beijing 100049, Peoples R China..
Carnegie Mellon Univ, Pittsburgh, PA 15213 USA..
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2015 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 115, no 9, 091803Article in journal (Refereed) Published
Abstract [en]

We report an observation of the process J/psi -> gamma X(1835) -> gamma(KSKS0)-K-0 eta at low (KSKS0)-K-0 mass with a statistical significance larger than 12.9s using a data sample of 1.31 x 109 J/psi events collected with the BESIII detector. In this region of phase space the (KSKS0)-K-0 system is dominantly produced through the f (0)(980). By performing a partial wave analysis, we determine the spin parity of the Xd1835_ to be J(PC) = 0(-+). The mass and width of the observed X(1835) are 1844 +/- 9(stat)(-25)(+16)(syst) MeV/c(2) and 192(-17)(+20)(sta)(-43)(+62)(syst) MeV, respectively, which are consistent with the results obtained by BESIII in the channel J/psi -> gamma pi(+)pi(-)eta'.

Place, publisher, year, edition, pages
2015. Vol. 115, no 9, 091803
National Category
Physical Sciences
URN: urn:nbn:se:uu:diva-262982DOI: 10.1103/PhysRevLett.115.091803ISI: 000360134200006OAI: oai:DiVA.org:uu-262982DiVA: diva2:856172
Available from: 2015-09-23 Created: 2015-09-23 Last updated: 2015-09-23Bibliographically approved

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Johansson, TordKupsc, AndrezejLi, CuiSchönning, KarinWolke, Magnus
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