期刊
PHYSICAL REVIEW LETTERS
卷 124, 期 3, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.124.032002
关键词
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资金
- National Key Basic Research Program of China [2015CB856700]
- China Postdoctoral Science Foundation [2018M630206]
- National Natural Science Foundation of China (NSFC) [11521505, 11625523, 11635010, 11675184, 11705209, 11735014, 11822506, 11835012, 11875115, 11905236]
- Chinese Academy of Science Focused Science Grant
- National 1000 Talents Program of China
- Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility Program
- NSFC [U1532257, U1532258, U1732263, U1832207]
- CAS [U1532257, U1532258, U1732263, U1832207]
- CASKeyResearch Program of Frontier Sciences [QYZDJ-SSWSLH003, QYZDJ-SSW-SLH040]
- Talents Program ofCAS
- Institute ofNuclear and Particle Physics, Astronomy and Cosmology (INPAC)
- Shanghai Key Laboratory for Particle Physics and Cosmology
- ERC [758462]
- German Research Foundation DFG, Collaborative Research Center [CRC 1044, FOR 2359]
- Istituto Nazionale di Fisica Nucleare, Italy
- Koninklijke Nederlandse Akademie van Wetenschappen (KNAW) [530-4CDP03]
- Ministry of Development of Turkey [DPT2006K120470]
- National Science and Technology fund
- STFC (United Kingdom)
- Knut and Alice Wallenberg Foundation (Sweden) [2016.0157]
- Royal Society, UK [DH140054, DH160214]
- Swedish Research Council
- U.S. Department of Energy [DE-FG0205ER41374, DE-SC-0010118, DE-SC-0012069]
- University of Groningen (RuG)
- Helmholtzzentrum fuer Schwerionenforschung GmbH (GSI), Darmstadt
Using a total of 11.0 fb(-1) of e(+)e(-) collision data with center-of-mass energies between 4.009 and 4.6 GeV and collected with the BESIII detector at BEPCII, we measure fifteen exclusive cross sections and effective form factors for the process e(+)e(-) -> Xi(-)Xi(+) by means of a single baryon-tag method. After performing a fit to the dressed cross section of e(+)e(-)-> Xi(-)Xi(+) no significant psi(4230) or psi(4260) resonance is observed in the Xi(-)Xi(+) final states, and upper limits at the 90% confidence level on T B-ee for the processes psi(4230)psi/(4260) -> Xi(-)Xi(+) are determined. In addition, an excited Xi baryon at 1820 MeV/c(2) is observed with a statistical significance of 6.2-6.5 sigma by including the systematic uncertainty, and the mass and width are measured to be M = (1825.5 +/- 4.7 +/- 4.7) MeV/c(2) and Gamma = (17.0 +/- 15.0 +/- 7.9) MeV, which confirms the existence of the J(P) =3-/2 state Xi (1820).
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