Data sets were collected with the BESⅢdetector at the BEPCⅡcollider at the center-of-mass energy of√s=3.650 GeV during May 2009 and at√s=3.773 GeV from January 2010 to May 2011.By analyzing the large angle Bhabha ...Data sets were collected with the BESⅢdetector at the BEPCⅡcollider at the center-of-mass energy of√s=3.650 GeV during May 2009 and at√s=3.773 GeV from January 2010 to May 2011.By analyzing the large angle Bhabha scattering events,the integrated luminosities of the two data sets are measured to be(44.49±0.02±0.44)pb-1 and(2916.94±0.18±29.17)pb-1,respectively,where the first error is statistical and the second error is systematic.展开更多
The number ofφ'events accumulated by the BESIII experiment from March 3 through April 14,2009,is determined by counting inclusive hadronic events.The result is 106.41×(1.00±0.81%)×10^6.The error is...The number ofφ'events accumulated by the BESIII experiment from March 3 through April 14,2009,is determined by counting inclusive hadronic events.The result is 106.41×(1.00±0.81%)×10^6.The error is systematic dominant;the statistical error is negligible.展开更多
基金Supported by the Ministry of Science and Technology of China(2009CB825204)National Natural Science Foundation of China(10625524,10821063,10825524,10835001,10935007,11125525,11235011)+7 种基金Joint Funds of the National Natural Science Foundation of China(11079008,11179007)Chinese Academy of Sciences Large-Scale Scientific Facility Program,CAS(KJCX2-YW-N29,KJCX2-YW-N45)100 Talents Program of CAS,German Research Foundation DFG(Collaborative Research Center CRC-1044)Istituto Nazionale di Fisica Nucleare,Italy,Ministry of Development of Turkey(DPT2006K-120470)U.S.Department of Energy(DE-FG02-04ER41291,DE-FG02-05ER41374,DE-FG02-94ER40823)U.S.National Science Foundation,University of Groningen(RuG)the Helmholtzzentrum fuer Schwerionenforschung GmbH(GSI)Darmstadt,WCU Program of National Research Foundation of Korea(R32-2008-000-10155-0)
摘要Data sets were collected with the BESⅢdetector at the BEPCⅡcollider at the center-of-mass energy of√s=3.650 GeV during May 2009 and at√s=3.773 GeV from January 2010 to May 2011.By analyzing the large angle Bhabha scattering events,the integrated luminosities of the two data sets are measured to be(44.49±0.02±0.44)pb-1 and(2916.94±0.18±29.17)pb-1,respectively,where the first error is statistical and the second error is systematic.
基金Supported by Ministry of Science and Technology of China(2009CB825200)National Natural Science Foundation of China(NSFC)(10625524,10821063,10825524,10835001,10935007,11125525,10975143,10979058),Joint Funds of the National Natural Science Foundation of China(11079008,11179007)+5 种基金Chinese Academy of Sciences(CAS)Large-Scale Scientific Facility ProgramCAS(KJCX2-YW-N29,KJCX2-YW-N45)100 Talents Program of CAS,Istituto Nazionale di Fisica Nucleare,Italy,Ministry of Development of Turkey(DPT2006K-120470)U.S.Department of Energy(DE-FG02-04ER41291,DE-FG02-91ER40682,DE-FG02-94ER40823)U.S.National Science Foundation,University of Groningen(RuG)the Helmholtzzentrum fuer Schwerionenforschung GmbH(GSI),Darmstadt,WCU Program of National Research Foundation of Korea(R32-2008-000-10155-0)
摘要The number ofφ'events accumulated by the BESIII experiment from March 3 through April 14,2009,is determined by counting inclusive hadronic events.The result is 106.41×(1.00±0.81%)×10^6.The error is systematic dominant;the statistical error is negligible.