Search for the decay J /ψ →γ+ invisible

(BESIII Collaboration)

Research output: Contribution to journalArticlepeer-review

Abstract

We search for J/ψ radiative decays into a weakly interacting neutral particle, namely an invisible particle, using the J/ψ produced through the process ψ(3686)→π+π-J/ψ in a data sample of (448.1±2.9)×106 ψ(3686) decays collected by the BESIII detector at BEPCII. No significant signal is observed. Using a modified frequentist method, upper limits on the branching fractions are set under different assumptions of invisible particle masses up to 12 GeV/c2. The upper limit corresponding to an invisible particle with zero mass is 7.0×10-7 at the 90% confidence level.

Original languageEnglish (US)
Article number112005
JournalPhysical Review D
Volume101
Issue number11
DOIs
StatePublished - Jun 1 2020

Bibliographical note

Funding Information:
The BESIII collaboration thanks the staff of BEPCII and the IHEP computing center and the supercomputing center of USTC for their strong support. This work is supported in part by National Key Basic Research Program of China under Contract No. 2015CB856700; National Natural Science Foundation of China (NSFC) under Contracts No. 11625523, No. 11635010, No. 11735014, No. 11822506, No. 11835012, No. 11935015, No. 11935016, No. 11935018, No. 11961141012; the Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility Program; Joint Large-Scale Scientific Facility Funds of the NSFC and CAS under Contracts No. U1732263, No. U1832207; CAS Key Research Program of Frontier Sciences under Contracts No. QYZDJ-SSW-SLH003, No. QYZDJ-SSW-SLH040; 100 Talents Program of CAS; Institute of Nuclear and Particle Physics (INPAC) and Shanghai Key Laboratory for Particle Physics and Cosmology; ERC under Contract No. 758462; German Research Foundation DFG under Contracts No. Collaborative Research Center CRC 1044, FOR 2359; Instituto Nazionale di Fisica Nucleare, Italy; Ministry of Development of Turkey under Contract No. DPT2006K-120470; National Science and Technology fund; STFC (United Kingdom); The Knut and Alice Wallenberg Foundation (Sweden) under Contract No. 2016.0157; The Royal Society, UK under Contracts No. DH140054, No. DH160214; The Swedish Research Council; U.S. Department of Energy under Contracts No. DE-FG02-05ER41374, No. DE-SC-0012069.

Funding Information:
We search for J / ψ radiative decays into a weakly interacting neutral particle, namely an invisible particle, using the J / ψ produced through the process ψ ( 3686 ) → π + π - J / ψ in a data sample of ( 448.1 ± 2.9 ) × 10 6     ψ ( 3686 ) decays collected by the BESIII detector at BEPCII. No significant signal is observed. Using a modified frequentist method, upper limits on the branching fractions are set under different assumptions of invisible particle masses up to 12     GeV / c 2 . The upper limit corresponding to an invisible particle with zero mass is 7.0 × 10 - 7 at the 90% confidence level. National Key Basic Research Program of China 10.13039/501100012166 2015CB856700 National Natural Science Foundation of China 10.13039/501100001809 11625523 11635010 11735014 11822506 11835012 11935015 11935016 11935018 11961141012 Chinese Academy of Sciences 10.13039/501100002367 U1732263 U1832207 Institute of Nuclear and Particle Physics (INPAC) Shanghai Key Laboratory for Particle Physics and Cosmology H2020 European Research Council 10.13039/100010663 758462 Deutsche Forschungsgemeinschaft 10.13039/501100001659 CRC 1044 FOR 2359 Instituto Nazionale di Fisica Nucleare 10.13039/501100004007 DPT2006K-120470 Ministry of Development of Turkey Science and Technology Facilities Council 10.13039/501100000271 Knut och Alice Wallenbergs Stiftelse 10.13039/501100004063 2016.0157 Royal Society 10.13039/501100000288 DH140054 DH160214 Vetenskapsrådet 10.13039/501100004359 U.S. Department of Energy 10.13039/100000015 DE-FG02-05ER41374 DE-SC-0012069 National Science and Technology fund

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