@article{7a832e9933f84ae384147cc102159258,
title = "Search for invisible decays of a dark photon using e+e− annihilation data at BESIII",
abstract = "We report a search for a dark photon using 14.9 fb−1 of e+e− annihilation data taken at center-of-mass energies from 4.13 to 4.60 GeV with the BESIII detector operated at the BEPCII storage ring. The dark photon is assumed to be produced in the radiative annihilation process of e+e− and to predominantly decay into light dark matter particles, which escape from the detector undetected. The mass range from 1.5 to 2.9 GeV is scanned for the dark photon candidate, and no significant signal is observed. The mass dependent upper limits at the 90\% confidence level on the coupling strength parameter for a dark photon coupling with an ordinary photon vary between 1.6 × 10−3 and 5.7 × 10−3. ",
keywords = "Dark photon, Dark sector, Invisible decays",
author = "\{BESIII Collaboration\} and M. Ablikim and Achasov, \{M. N.\} and N. Kalantar-Nayestanaki and R. Kappert and M. Kavatsyuk and J. Messchendorp and V. Rodin",
note = "Funding Information: The BESIII collaboration thanks the staff of BEPCII and the IHEP computing center for their strong support. This work is supported in part by National Key R\&D Program of China under Contracts Nos. 2020YFA0406400 , 2020YFA0406300 ; National Natural Science Foundation of China (NSFC) under Contracts Nos. 11635010 , 11735014 , 11835012 , 11935015 , 11935016 , 11935018 , 11961141012 , 12022510 , 12025502 , 12035009 , 12035013 , 12192260 , 12192261 , 12192262 , 12192263 , 12192264 , 12192265 ; the Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility Program; Joint Large-Scale Scientific Facility Funds of the NSFC and CAS under Contract No. U1832207 ; CAS Key Research Program of Frontier Sciences under Contract No. QYZDJ-SSW-SLH040 ; 100 Talents Program of CAS ; Project ZR2022JQ02 supported by Shandong Provincial Natural Science Foundation ; INPAC and Shanghai Key Laboratory for Particle Physics and Cosmology ; ERC under Contract No. 758462 ; European Union's Horizon 2020 research and innovation programme under Marie Sklodowska-Curie grant agreement under Contract No. 894790 ; German Research Foundation DFG under Contracts Nos. 443159800 , Collaborative Research Center CRC 1044 , GRK 2149 ; Istituto Nazionale di Fisica Nucleare, Italy ; Ministry of Development of Turkey under Contract No. DPT2006K-120470 ; National Science and Technology fund ; STFC (United Kingdom); The Royal Society , UK under Contracts Nos. DH140054 , DH160214 ; The Swedish Research Council ; U.S. Department of Energy under Contract No. DE-FG02-05ER41374 . Funding Information: The BESIII collaboration thanks the staff of BEPCII and the IHEP computing center for their strong support. This work is supported in part by National Key R\&D Program of China under Contracts Nos. 2020YFA0406400, 2020YFA0406300; National Natural Science Foundation of China (NSFC) under Contracts Nos. 11635010, 11735014, 11835012, 11935015, 11935016, 11935018, 11961141012, 12022510, 12025502, 12035009, 12035013, 12192260, 12192261, 12192262, 12192263, 12192264, 12192265; the Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility Program; Joint Large-Scale Scientific Facility Funds of the NSFC and CAS under Contract No. U1832207; CAS Key Research Program of Frontier Sciences under Contract No. QYZDJ-SSW-SLH040; 100 Talents Program of CAS; Project ZR2022JQ02 supported by Shandong Provincial Natural Science Foundation; INPAC and Shanghai Key Laboratory for Particle Physics and Cosmology; ERC under Contract No. 758462; European Union's Horizon 2020 research and innovation programme under Marie Sklodowska-Curie grant agreement under Contract No. 894790; German Research Foundation DFG under Contracts Nos. 443159800, Collaborative Research Center CRC 1044, GRK 2149; Istituto Nazionale di Fisica Nucleare, Italy; Ministry of Development of Turkey under Contract No. DPT2006K-120470; National Science and Technology fund; STFC (United Kingdom); The Royal Society, UK under Contracts Nos. DH140054, DH160214; The Swedish Research Council; U.S. Department of Energy under Contract No. DE-FG02-05ER41374. Publisher Copyright: {\textcopyright} 2023 The Author(s)",
year = "2023",
month = apr,
day = "10",
doi = "10.1016/j.physletb.2023.137785",
language = "English",
volume = "839",
journal = "Physics Letters B",
issn = "0370-2693",
publisher = "ELSEVIER SCIENCE BV",
}