@article{bec40741c0ee4a9580650099ee5cce57,
title = "Search for η and η′ invisible decays in J/ψ→η and η′ ",
abstract = "Using a sample of (225.3±2.8)×106 J/ψ decays collected with the BESIII detector at BEPCII, searches for invisible decays of η and η′ in J/ψ→η and η′ are performed. Decays of →K+K- are used to tag the η and η′ decays. No signals above background are found for the invisible decays, and upper limits at the 90% confidence level are determined to be 2.6×10-4 for the ratio B(η→invisible) B(η→γγ) and 2.4×10-2 for B(η′→invisible)B(η ′→γγ). These limits may be used to constrain light dark matter particles or spin-1 U bosons.",
author = "{BESIII Collaboration} and M. Ablikim and Achasov, {M. N.} and O. Albayrak and Ambrose, {D. J.} and An, {F. F.} and Q. An and Bai, {J. Z.} and Y. Ban and J. Becker and Bennett, {J. V.} and M. Bertani and Bian, {J. M.} and E. Boger and O. Bondarenko and I. Boyko and Briere, {R. A.} and V. Bytev 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, {J. C.} and Chen, {M. L.} and Chen, {S. J.} and X. Chen and Chen, {Y. B.} and Cheng, {H. P.} and Chu, {Y. P.} and D. Cronin-Hennessy and Dai, {H. L.} and Dai, {J. P.} and D. Dedovich and Deng, {Z. Y.} and A. Denig and I. Denysenko and M. Destefanis and Ding, {W. M.} and Y. Ding and Dong, {L. Y.} and Dong, {M. Y.} and Du, {S. X.} and J. Fang and Fang, {S. S.} and L. Fava and Feng, {C. Q.}",
note = "Publisher Copyright: {\textcopyright} 2013 American Physical Society.",
year = "2013",
month = jan,
day = "24",
doi = "10.1103/PhysRevD.87.012009",
language = "English",
volume = "87",
journal = "Physical Review D - Particles, Fields, Gravitation and Cosmology",
issn = "1550-7998",
number = "1",
}