The past decades witnessed the golden era of hadron physics. Many excited open heavy
flavor mesons and baryons have been observed since 2017. We shall provide an updated …

In the past decade many charmonium-like states were observed experimentally. Especially
those charged charmonium-like Z c states and bottomonium-like Z b states cannot be …

We review the current status of heavy-quark symmetry and its applications to weak decays of
hadrons containing a single heavy quark. After an introduction to the underlying physical …

Chiral symmetry and its spontaneous breaking play an important role both in the light
hadron and heavy hadron systems. The chiral perturbation theory (χ PT) is the low energy …

Baryon chiral perturbation theory is developed using an effective lagrangian in which the
baryons appear as heavy static fields. The chiral logarithmic corrections to the axial current …

The measured B¯→ D (*) l ν¯ decay rates for light leptons (l= e, μ) constrain all B¯→ D (*)
semileptonic form factors, by including both the leading and O (Λ QCD/mc, b) subleading …

Understanding the physics of heavy quarks gives physicists a unique opportunity to test the
predictions of quantum chromodynamics and the Standard Model. This introductory text …

An effective Lagrangian that describes the low-momentum interactions of mesons containing
a heavy quark with the pseudo Goldstone bosons π, K, and η is constructed. It is invariant …

Since the discovery of the first charmed meson in 1976, many open-charm and open-bottom
hadrons were observed. In 2003 two narrow charm-strange states $ D_ {s0}^{\ast}(2317) …

We consider processes which produce final state hadrons whose energy is much greater
than their mass. In this limit interactions involving collinear fermions and gluons are …