@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",
}