Journal
PHYSICAL REVIEW D
Volume 91, Issue 11, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.91.112005
Keywords
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Funding
- National Key Basic Research Program of China [2015CB856700]
- National Natural Science Foundation of China (NSFC) [10935007, 11121092, 11125525, 11235011, 11322544, 11335008, 11375170, 11275189, 11079030, 11475164, 11005109, 11475169]
- Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility Program
- Joint Large-Scale Scientific Facility Funds of the NSFC and CAS [11179007, U1232201, U1332201]
- CAS [KJCX2-YW-N29, KJCX2-YW-N45]
- 100 Talents Program of CAS
- INPAC and the Shanghai Key Laboratory for Particle Physics and Cosmology
- German Research Foundation DFG [Collaborative Research Center CRC-1044]
- Istituto Nazionale di Fisica Nucleare, Italy
- Ministry of Development of Turkey [DPT2006K-120470]
- Russian Foundation for Basic Research [14-07-91152]
- U.S. Department of Energy [DE-FG02-04ER41291, DE-FG02-05ER41374, DE-FG02-94ER40823, DESC0010118]
- U.S. National Science Foundation
- University of Groningen (RuG) and the Helmholtzzentrum fuer Schwerionenforschung GmbH (GSI), Darmstadt
- WCU Program of the National Research Foundation of Korea [R32-2008-000-10155-0]
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Using data samples collected with the BESIII detector operating at the BEPCII collider at 17 center-of-mass energies from 3.810 to 4.600 GeV, we perform a study of e(+)e(-) -> eta J/psi and pi(0)J/psi The Born cross sections of these two processes are measured at each center-of-mass energy. The measured energy-dependent Born cross section for e(+)e(-) -> eta J/psi shows an enhancement around 4.2 GeV. The measurement is compatible with an earlier measurement by Belle.
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