Speaker
Mr
Chunjiang Shi
(CAS, IHEP)
Description
We study the S-wave D\bar{D}^(I=0) scattering at four different pion masses m_\pi ranging from 250 MeV to 417 MeV from N_f=2 lattice QCD. A bound state near the D\bar{D}^ threshold likely exists even after considering the possible left-hand cut effect due to the one pion exchange interaction. At m_\pi\approx 417 MeV where the effective range expansion is valid, the compositeness of the bound state is X\approx 1 and indicates a predominant D\bar{D}^* component. This state may correspond to X(3872). On the other hand, our results of the finite volume energies also hint at the existence of a 1^{++} resonance below 4.0 GeV.
Primary authors
Mr
Chunjiang Shi
(CAS, IHEP)
Mr
Haozheng Li
(Wuhan University)
Prof.
Ying Chen
(IHEP, CAS)
Mr
Juzheng Liang
(USTC)
Prof.
Ming Gong
(IHEP, CAS)
Prof.
Zhaofeng Liu
(IHEP, CAS)
Prof.
Wei Sun
(IHEP, CAS)
