@article{ce537dd415774c63bca7eea6e36aadf2,
title = "Observation and spin-parity determination of the X(1835) in J/ψ → γK0 SK0 Sη",
abstract = "We report an observation of the process J/ψ → γX(1835) → γK0 SK0 Sη at low K0 SK0 S mass with a statistical significance larger than 12.9σ using a data sample of 1.31 × 109 J/ψ events collected with the BESIII detector. In this region of phase space the K0 SK0 S system is dominantly produced through the f0(980). By performing a partial wave analysis, we determine the spin parity of the X(1835) to be JPC = 0−+. The mass and width of the observed X(1835) are 1844 ± 9(stat)+16 −25 (syst) MeV/c2 and 192+20 −17 (stat)+62 −43 (syst) MeV, respectively, which are consistent with the results obtained by BESIII in the channel J/ψ → γπ+π−η'.",
author = "\{BESIII Collaboration\} and M. Ablikim and Achasov, \{M. N.\} and Ai, \{X. C.\} and O. Albayrak and M. Albrecht and Ambrose, \{D. J.\} and A. Amoroso and An, \{F. F.\} and Q. An and Bai, \{J. Z.\} and \{Baldini Ferroli\}, R. and Y. Ban and Bennett, \{D. W.\} and Bennett, \{J. V.\} and M. Bertani and D. Bettoni and Bian, \{J. M.\} and F. Bianchi and E. Boger and I. Boyko and Briere, \{R. A.\} and H. Cai and X. Cai and O. Cakir and A. Calcaterra and Cao, \{G. F.\} and Cetin, \{S. A.\} and Chang, \{J. F.\} and G. Chelkov and G. Chen and Chen, \{H. S.\} and Chen, \{H. Y.\} and Chen, \{J. C.\} and Chen, \{M. L.\} and Chen, \{S. J.\} and X. Chen and Chen, \{X. R.\} and Chen, \{Y. B.\} and Cheng, \{H. P.\} and Chu, \{X. K.\} and G. Cibinetto and Dai, \{H. L.\} and Dai, \{J. P.\} and A. Dbeyssi and D. Dedovich and Deng, \{Z. Y.\} and A. Denig and I. Denysenko and M. Destefanis and \{De Mori\}, F.",
note = "Publisher Copyright: {\textcopyright} 2015 American Physical Society.",
year = "2015",
doi = "10.1103/PhysRevLett.115.091803",
language = "English",
volume = "115",
pages = "091803--1--091803--7",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "9",
}