1、the intrinsic nature of the resonance, ISR technique 12% rule non-DD decay of , stringent test of the various theoretical approaches Knowledge of P-wave spin-singlet hc rather sparse, h-h mixing test QCD-based calculations 23.773 GeV dataJ/y y datay y(3686) dataBESIII1310 M448 MBESII58 M14 MCLEO-c-2

2、6 Mpb-1The physics goals of BESIII :Light hadron spectroscopy, charm physics, physics, charmonium physics, R value 34.009 GeV4.260 GeV4.230 GeV4.360 GeV3.773 GeVPLB 761:98 (2016)PLB 749:441(2015)Method: ISR technique4(J/y)*Bmm (eV)(J/y) (keV)ReferenceBESIII334.42.54.45.580.050.08Arxiv:1604.01924BaBa

3、r330.17.77.35.610.20PRD 69 011103RCLEO338.45.87.15.680.110.13PRD 73 051103R(y(3686) (keV)ReferenceBESIII2.2130.0180.099PLB 749 414(2015)BESII2.3380.0370.096PLB 659 74(2008)BESII2.3300.0360.110PRL 97 121801(2006)BESII2.440.21PLB 550 24 (2002)RVUE2.140.21NPB 320 45(1989)Comparisons of for J/yCompariso

4、ns of for y(3686)5/Jy /(1385)(1385)Jy y /(1385)(1385)Jy (1385)(1385)y (1385)(1385)y recoil22CM()MEEpPRD 93:072003 (2016)6Reconstruct onebaryonic resonant/Jy /(1385)(1385)Jy y /(1385)(1385)Jy (1385)(1385)y (1385)(1385)y Value (%)26.730.502.307.760.550.686.880.400.50(/)()Br JBryy (/(1385)(1385) )(1385

5、)(1385) )Br JBryy (/(1385)(1385) )(1385)(1385) )Br JBryy Not in agree with 12% rule!7PRD 91:092006 (2015)8PRD 91:092006 (2015)9PRD 89:112006 (2014)10Neglect the interference between (3686) decay and continuum production2() K K 3() K KPLB 753:103(2016)PRD 91:092009 (2015)1112PRD 89:112005 (2014)13PRL 116:251802 (2016)447M y(3686) data14y(3686)0hc tag Search for new hc decays modesPRD 91:112008 (2015)106 M y(3686) data1516More data and PWA analysis metho