1、郑郑 波波南华大学核科学技术学院南华大学核科学技术学院（ For the BESIII Collaboration）Studies of Charmonium at BESIII第第 12届全国粒子物理大会届全国粒子物理大会 中国科技大学中国科技大学 2016.8.22-26Production and decay mechanism of charmonium: Gee of J/y, y(3686) and X(3872) the intrinsic nature of the resonance, ISR technique Baryonic pair and other decay o
2、f J/y, y(3686) 12% rule Radiative decay of y(3770) non-DD decay of y(3770) , stringent test of the various theoretical approaches Radiative decay of hcKnowledge of P-wave spin-singlet hc rather sparse, h-h mixing Decays of ccJtest QCD-based calculations Outline23.773 GeV dataJ/y data y(3686) dataBES
3、III 1310 M 448 MBESII 58 M 14 MCLEO-c - 26 Mpb-1BESIIIThe physics goals of BESIII :Light hadron spectroscopy, charm physics, physics, charmonium physics, R value 34.009 GeV4.260 GeV4.230 GeV4.360 GeVGee measurement3.773 GeVPLB 761:98 (2016) PLB 749:441(2015)Method: ISR technique4Gee(J/y)*Bmm (eV) Ge
4、e(J/y) (keV) ReferenceBESIII334.42.54.4 5.580.050.08 Arxiv:1604.01924BaBar 330.17.77.3 5.610.20 PRD 69 011103RCLEO 338.45.87.1 5.680.110.13 PRD 73 051103RGee(y(3686) (keV) ReferenceBESIII2.2130.0180.099 PLB 749 414(2015)BESII 2.3380.0370.096 PLB 659 74(2008)BESII 2.3300.0360.110 PRL 97 121801(2006)B
5、ESII 2.440.21 PLB 550 24 (2002)RVUE 2.140.21 NPB 320 45(1989)Comparisons of Gee for J/yComparisons of Gee for y(3686)5y X+ X-, S(1385)+S(1385)-PRD 93:072003 (2016)6Reconstruct onebaryonic resonantValue (%)26.730.502.307.760.550.686.880.400.50Not in agree with 12% rule!7y(3686) K-LX+c.c.PRD 91:092006 (2015)84.9 s 6.2 sy(3686) gK-LX+c.c.PRD 91:092006 (2015)9y(3686) wK+K-PRD 89:112006 (2014)10Neglect the interference between (3686) decay and continuum production
