SOME THEORETICAL ISSUES OF HADRON PRODUCTIONS AND PROPERTIES FROM J/ψ DECAYS
J/ψ strong decay is one of the best places to study the hadronic structure and the strong interaction. In this talk, as the background contribution, the proton pole diagram contribution to the branching ratio and the angular distribution in decays is analyzed. The applicability of quark models is explored via process. The structures of N*s, especially Roper resonance, are discussed by studying J/ψ decays. The productions of possible multi-quark systems via charmonium and bottomonium strong/radiative decays are also investigated.

title: Revisiting the spectrum of baryonium in heavy baryon chiral perturbation theory
abstract: In the framework of the heavy baryon perturbation theory, in which the two-pion exchange is considered, the physical properties of heavy baryon and anti-heavy baryon systems are revisited. The potentials between heavy baryon and anti-heavy baryon are extracted in a holonomic form. Based on the extracted potentials, the S-wave scattering phase shifts and scattering lengths of Lambda(c)-(Lambda(c)) over bar and Sigma(c)-(Sigma(c)) over bar are calculated. From these scattering features, it is found that the Lambda(c)-(Lambda(c)) over bar system can be bound only when the value of the coupling constant at the baryon-Goldstone-boson vertex is larger than that calculated from the decay data of the Sigma(c)(Sigma c*) -> Lambda(c)pi process. The binding condition for the Sigma(c)-(Sigma(c)) over bar system is also examined. The binding possibilities of these systems deduced from the scattering calculations are also checked by the bound state calculation and the binding energies are obtained if the system can be really bound. The binding possibility of the Lambda(b)-(Lambda) over barb system is investigated as well.

title: Possible heavy dibaryons
abstract: In the framework of the constituent quark model, the possible S-wave heavy dibaryon states with the c flavor are investigated. The factors which are responsible for the binding behavior of the dibaryon system are analyzed. It is shown that both the symmetry character of the system and the energy of interactions between interacting quarks are important for the binding behavior of the two-baryon system with the heavy flavor. As a result, seven possible candidates of heavy dibaryons with c flavor are predicted.

title: Maximum Entropy Principle for Self-gravitating Perfect Fluid in Lovelock Gravity
abstract: We consider a static self-gravitating system consisting of perfect fluid with isometries of an $(n-2)$-dimensional maximally symmetric space in Lovelock gravity theory. A straightforward analysis of the time-time component of the equations of motion suggests a generalized mass function. Tolman-Oppenheimer-Volkoff like equation is obtained by using this mass function and gravitational equations. We investigate the maximum entropy principle in Lovelock gravity, and find that this Tolman-Oppenheimer-Volkoff equation can also be deduced from the so called "maximum entropy principle" which is originally customized for Einstein gravity theory. This investigation manifests a deep connection between gravity and thermodynamics in this generalized gravity theory.