Mass Spectrum And Strong Decays Of Heavy-light Mesons

In the past decade, experiments (BESIII, Belle, BaBar, CLEOc, CDF, DO, and LHCb) have played a crucial role in observing new hadronic states, which include the charmonium-like states X, Y, Z and higher excitations of heavy-light mesons. It is an exciting time for both theorist and experimentalist since these observations provide an ideal platform to understand the non-perturbative quantum chromodynamics (QCD). The study of these new hadronic states is a research field full of opportunities and challenges.Inspired by the recent observations of D(3000), D*(3000) by LHCb and the evidence of B(5970) reported by CDF, we carry out a comprehensive study on the mass spectra and the strong decay behaviours of higher states of D, B and Bs meson family. We not only explain the underlying structures of these newly observed D(3000), D*(3000) and B(5970), but also predict the decay behavior of their partners, which provide important information to future experiments such as Belleâ…¡ and LHCb.In Section â… , we briefly review the history of QCD and quark model. In addition, the status of the recent experimental progress on these discussed charmed and bottom states are given here. In Section â…¡, we introduce the models adopted in our calculation, which include the Cornell potential model, the Gordfrey Isugar (GI) potential model, the quark pair creation (QPC) model and the coupled-channel model. Here, the GI potential model is applied to calculate the mass spectrum of D, B and Bs mesons while the strong decay was described by the QPC model. In the last section, the numerical results and the phenomenological analysis are presented.