The Production,Decay And Interaction Mechanism Of The Heavy Flavored Hadrons

In recent years,a large amount of heavy flavored states and abnormal near-threshold behaviors were observed,they challenge our knowledge of strong interaction at low energy.For the spectroscopic study of the heavy flavored states,as well as learning their non-perturbative nature,we need to study their properties in many aspects.In this thesis,we focus on the production,decay and heavy hadrons interaction of heavy flavored states.We first introduce heavy quark symmetry and chiral symmetry,then we show how these symmetry can be utilized to construct theoretical models at hadronic level,after that we use them to investigate the decay properties of highly exited B meson state B(5970)and its partners.The results indicate that the experiments can discover and further identify these 2S states through some specific decay channels.Our work is an important reference to future experimental search.later we study the production of heavy flaovred states.We study the productions of the 2P chamed state states(including D(*)(3000)and DSj(3040)states)in B meson semileptonic decays,our results shows that their production rate is sizable,therefore it is promising to observe these charmed mesons in experiments.We expect that future experiments can establish the charmed meson family through the B decay processes,where our work is an important reference.Next,we investigate the charmonium production in low energy pp collision.Our results shows that the production cross sections are considerable,we also find that the angular distributions are influenced by nucleon exited states.This work is an important support to future PANDA program.At last we study the heavy hadrons int,eraction and their effects.Within the chiral perturbation theory,we investigate the heavy hadrons interaction of a typical system DD*,We find that,in some channels the interactions are strong enough to form bound states.Later we investigate the influence of the heavy hadrons interaction in the process B?X(3823)K and other similar processes,here we adopt the rescattering model within the effective lagrangian approach.Our results show that the heavy hadrons interaction indeed enhance the decay rate.Our research not only helps to understand the heavy hadrons interaction,but also can instruct experiments to establish the D wave charmonium family.Through the investigation of the production,decay and interaction,we provide a more complete picture of heavy flavored states,which is helpful to a deeper understanding of strong interaction in low energy.