Speaker
Prof.
Feng-Kun Guo
(Institute of Theoretical Physics, CAS)
Description
Since the discovery of the D_{s0}^*(2317) and the D_{s1}(2460) in 2003, there have been 3 puzzles in the spectroscopy of positive-parity charm mesons: (1) why are the D_{s0}^*(2317) and D_{s1}(2460) masses much lower than the quark model predictions for the lowest positive parity charm mesons? (2) why is the mass difference between the D_{s0}^*(2317) and the D_{s1}(2460) is equal to that between the D and the D^* within 2 MeV? (3) why do the nonstrange partners of these two charm-strange mesons have masses larger than or similar to them? In this walk, I will show that all these puzzles find a natural resolution in the picture that these lowest positive-parity charm mesons are dynamically generated from the interaction between the light pseudoscalar mesons and ground-state charm mesons.
Primary author
Prof.
Feng-Kun Guo
(Institute of Theoretical Physics, CAS)
