Using inclusive decays of J/ψaprecise determination of the number of J/ψevents collected with the BESIII detector was performed.For the two data sets taken in 2009 and 2012,the numbers of J/ψevents were recalculate...Using inclusive decays of J/ψaprecise determination of the number of J/ψevents collected with the BESIII detector was performed.For the two data sets taken in 2009 and 2012,the numbers of J/ψevents were recalculated to be(224.0±1.3)×106and(1088.5±4.4)×106,respectively;these numbers are in good agreement with the previous measurements.For the J/ψsample taken in 2017-2019,the number of events was determined to be(8774.0±39.4)×106.The total number of J/ψevents collected with the BESIII detector was determined to be(10087±44)×106,where the uncertainty is dominated by systematic effects,and the statistical uncertainty is negligible.展开更多
基金Supported in part by National Key R&D Program of China(2020YFA0406300,2020YFA0406400)National Natural Science Foundation of China(NSFC)(11625523,11635010,11735014,11822506,11835012,11935015,11935016,11935018,11961141012,12022510,12025502,12035009,12035013,12061131003,12075252)+16 种基金the Chinese Academy of Sciences(CAS)Large-Scale Scientific Facility ProgramJoint Large-Scale Scientific Facility Funds of the NSFC and CAS(U1732263,U1832207)CAS Key Research Program of Frontier Sciences(QYZDJ-SSW-SLH040)100 Talents Program of CASINPAC and Shanghai Key Laboratory for Particle Physics and CosmologyERC(758462)European Union Horizon 2020 research and innovation programme Marie Sklodowska-Curie grant agreement(894790)German Research Foundation DFG(443159800),Collaborative Research Center CRC 1044,FOR 2359,GRK 214Istituto Nazionale di Fisica Nucleare,ItalyMinistry of Development of Turkey under Contract No.DPT2006K-120470National Science and Technology fundOlle Engkvist Foundation(200-0605)STFC(United Kingdom)The Knut and Alice Wallenberg Foundation(Sweden)(2016.0157)The Royal Society,UK(DH140054,DH160214)The Swedish Research CouncilU.S.Department of Energy(DE-FG02-05ER41374,DE-SC-0012069)
摘要Using inclusive decays of J/ψaprecise determination of the number of J/ψevents collected with the BESIII detector was performed.For the two data sets taken in 2009 and 2012,the numbers of J/ψevents were recalculated to be(224.0±1.3)×106and(1088.5±4.4)×106,respectively;these numbers are in good agreement with the previous measurements.For the J/ψsample taken in 2017-2019,the number of events was determined to be(8774.0±39.4)×106.The total number of J/ψevents collected with the BESIII detector was determined to be(10087±44)×106,where the uncertainty is dominated by systematic effects,and the statistical uncertainty is negligible.