期刊
PHYSICAL REVIEW D
卷 98, 期 7, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.98.072005
关键词
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资金
- National Key Basic Research Program of China [2015CB856700]
- National Natural Science Foundation of China (NSFC) [11125525, 11235011, 11322544, 11335008, 11425524, 11625523, 11635010, 11375170, 11275189, 11475164, 11475169, 11605196, 11605198, 11705192, 11735014]
- Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility Program
- 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 [U1232201, U1332201, U1532257, U1532258, U1532102, U1732263]
- CAS [KJCX2-YW-N29, KJCX2-YW-N45, QYZDJ-SSW-SLH003]
- 100 Talents Program of CAS
- National 1000 Talents Program of China
- Institute of Nuclear and Particle Physics, Astronomy and Cosmology (INPAC)
- Shanghai Key Laboratory for Particle Physics and Cosmology
- German Research Foundation DFG [CRC 1044, FOR 2359]
- Istituto Nazionale di Fisica Nucleare, Italy
- Koninklijke Nederlandse Akademie van Wetenschappen (KNAW) [530-4CDP03]
- Ministry of Development of Turkey [DPT2006K-120470]
- National Science and Technology fund
- Swedish Resarch Council
- U.S. Department of Energy [DE-FG02-05ER41374, DE-SC-0010118, DE-SC-0010504, DE-SC-0012069]
- U.S. National Science Foundation
- University of Groningen (RuG)
- Helmholtzzentrum fuer Schwerionenforschung GmbH (GSI), Darmstadt
- WCU Program of National Research Foundation of Korea [R32-2008-000-10155-0]
Using 1.31 x 10(9) J/psi events collected by the BESIII detector at the BEPCII e(+)e(-) collider, we report the first observation of the h(1)(1380) in J/psi -> eta'h(1)(1380) with a significance of more than ten standard deviations. The mass and width of the possible axial-vector strangeonium candidate h(1)(1380) are measured to be M = (1423.2 +/- 2.1 +/- 7.3) MeV/c(2) and Gamma = (90.3 +/- 9.8 +/- 17.5) MeV. The product branching fractions, assuming no interference, are determined to be B(J/psi -> eta'h(1)(1380)) x B(h(1)(1380) -> K*(892)K-+(-)+c.c.) = (1.51 +/- 0.09 +/- 0.21) x 10(-4) in eta'K+K-pi(0) mode and B(J/psi -> eta'h(1)(1380)) x B(h(1)(1380) -> K*(892)(K) over bar +c.c.) =(2.16 +/- 0.12 +/- 0.29) x 10(-4) in eta'(KSK +/-)-K-0 pi(-/+) mode. The first uncertainties are statistical and the second are systematic. Isospin symmetry violation is observed in the decays h(1)(1380) K*(892)K-+(-) + c.c. and h(1)(1380) -> K*(892)(0)(K) over bar (0) + c.c.. Based on the measured h(1)(1380) mass, the mixing angle between the states h(1)(1170) and h(1)(1380) is determined to be (35.9 +/- 2.6)degrees, consistent with theoretical expectations.
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