Ablikim M.Achasov M.NAdlarson P.Albrecht M.Aliberti R.Amoroso A.Çetin, Serkant AliKolcu, Onur Buğra2022-12-192022-12-192022Ablikim, M., Achasov, M. N., Adlarson, P., Albrecht, M., Aliberti, R., Amoroso, A., ... & Jiang, X. S. (2022). Search for a massless dark photon in Λ c+→ p γ′ decay. Physical Review D, 106(7), 072008.2470-0010http://dx.doi.org/10.1103/PhysRevD.106.072008https://hdl.handle.net/20.500.12713/3600A search for a massless dark photon ?? is conducted using 4.5 fb-1 of e+e- collision data collected at center-of-mass energies between 4.600 and 4.699 GeV with the BESIII detector at BEPCII. No significant signal is observed, and the upper limit on the branching fraction B(?c+?p??) is determined to be 8.0×10-5 at 90% confidence level. © 2022 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.eninfo:eu-repo/semantics/openAccessArticle1067WOS:0008921873000022-s2.0-85141447805Q110.1103/PhysRevD.106.072008Q1