A review of the open charm and open bottom systems

Understand

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 $D_{s0}^*(2317)$ and $D_{s1}(2460)$ were discovered by the BaBar and CLEO Collaborations, respectively.
• After that, more excited heavy hadrons were reported.
• In this work, we review the experimental and theoretical progress in this field.