Observation of e(+)e(-) -> eta ' J/psi center-of-mass energies between 4.189 and 4.600 GeV

Çalışmada 434 yazar bulunmaktadır. Bu yazarlardan sadece Bursa Uludağ Üniversitesi mensuplarının girişleri yapılmıştır. The process e(+)e(-) -> eta' J/psi is observed for the first time with a statistical significance of 8.6 sigma at center-of-mass energy root s = 4.226 GeV and 7.3 sigma at root s = 4.258 GeV using data samples collected with the BESIII detector. The Born cross sections are measured to be (3.7 +/- 0.7 +/- 0.3) and (3.9 +/- 0.8 +/- 0.3) pb at root s = 4.226 and 4.258 GeV, respectively, where the first errors are statistical and the second systematic. Upper limits at the 90% confidence level of the Born cross sections are also reported at other 12 energy points. National Basic Research Program of China - 2015CB856700 National Natural Science Foundation of China (NSFC) - 11125525 - 11235011 - 11322544 - 11335008 -11425524 Chinese Academy of Sciences CAS Center for Excellence in Particle Physics (CCEPP) Collaborative Innovation Center for Particles and Interactions (CICPI) Joint Large-Scale Scientific Facility Funds of the NSFC and CAS - 11179007 - U1232201 - U1332201 Chinese Academy of Sciences - KJCX2-YW-N29 - KJCX2-YW-N45 National 1000 Talents Program of China German Research Foundation DEG under Collaborative Research Center - CRC-1044 Russian Foundation for Basic Research (RFBR) - 14-07-91152 United States Department of Energy (DOE) - DE-FG02-04ER41291 - DE-FG02-05ER41374 - DE-SC-0010504 - DE-SC0012069 - DESC0010118 National Science Foundation (NSF) Helmholtzzentrum fuer Schwerionenforschung GmbH (GSI), Darmstadt National Research Foundation of Korea - R32-2008-000-10155-0 Shanghai Key Laboratory for Particle Physics and Cosmology Istituto Nazionale di Fisica Nucleare (INFN) Koninklijke Nederlandse Akademie van Wetenschappen (KNAW) - 530-4CDP03 Türkiye Cumhuriyeti Kalkınma Bakanlığı - DPT2006K-120470