Speaker
Prof.
Hongxia Huang
(Nanjing Normal University)
Description
The LHCb collaboration published new data on penta-quark states: three narrow states Pc(4312), Pc(4440), Pc(4457) are claimed. All of these states are higher than the threshold of NJ/psi threshold and appeared as narrow resonances in the scattering channel N-J/psi. We had analyzed these states in EPJC(2016)76:624 and PRD99(2019)014010. In this report we will reanalyze these states and the main points are: 1.The measured ones are resonances, it is better to do resonances scattering calculation rather than as bound states; 2.These states are narrow resonances due to coupling of Sigma_c-D, Sigma_c-D* quark cluster states to the N-J/psi scattering states. Their spin-parity are 1/2-, 3/2- and cannot be positive parity ones; 3. There should be other resonances in this energy region due to Sigma_c*-D,Sigma_c*-D* coupling; 4.In the N-eta_c scattering channel one should be able to observe similar scattering resonances; 5. There might be Jp=1/2- N-eta_c and 3/2- N-J/psi bound states around 3881-3884 and 3997-3998 MeV.
Primary authors
Prof.
Hongxia Huang
(Nanjing Normal University)
Prof.
Jialun Ping
(Nanjing Normal University)
