Conveners
Parallel Session IV (2)：Hadron and Flavor Physics
- Changzheng YUAN (IHEP, Beijing)
To understand the nature of vector charmonium and charmonium-like states better, the measurements of the cross-section of e+ e- -> pi+ pi- J/psi, e+ e- -> K+ K- J/psi, e+ e- -> pi+ pi- psi2(3823), e+ e- -> D+ D- and e+ e- -> D*+ D- are performed at BESIII recently. This talk will include the new decay modes of the well-known resonance, such as Y(4230), and the new observed structures that...
Using 980 fb-1 of data on and around the Υ(nS)(n=1,2,3,4,5) resonances collected with the Belle detector at KEKB, the two-photon process γγ-> γψ(2S) is studied from √s = 3.7 GeV to 4.2 GeV for the first time. Two structures with resonance parameters being measured are seen in the invariant mass distribution of γψ(2S). And the cross section of e+e- ->ηϕ via initial-state radiation are measured...
With the worldly largest psi(2S) samples collected at BEESIII, systematic studies of the decays of eta_c(2S) are performed. As an example, the observation of the decay eta_c(2S) -> 3 (pi+ pi-) will be reported in this talk. Based on the 450M psi(2S) samples, the mass and width of h_c are updated as well as the branching fraction of psi(2S) -> pi0 h_c. In this talk, search for new hadronic...
We have studied color-octet contributions for $J/\psi$ inclusive production at B factories, i.e., $e^+e^-\to J/\psi({^{3}\hspace{-0.6mm}P_{J}^{[8]}},{^{1}\hspace{-0.6mm}S_{0}^{[8]}}) + X_{\mathrm{non}-c\bar c}$, using the soft gluon factorization (SGF) approach, in which the $J/\psi$ energy spectrum is expressed in a form of perturbatively calculable short-distance hard parts convoluted with...
