title: A review of the open charm and open bottom systems.
abstract: 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 [Formula: see text] and Ds1(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.
authors.affiliation: School of Physics and Beijing Key Laboratory of Advanced Nuclear Materials and Physics, Beihang University, Beijing 100191, People's Republic of China.
authors.forename: Hua-Xing
authors.initials: HX
authors.lastname: Chen
authors.forename: Wei
authors.initials: W
authors.lastname: Chen
authors.forename: Xiang
authors.initials: X
authors.lastname: Liu
authors.forename: Yan-Rui
authors.initials: YR
authors.lastname: Liu
authors.forename: Shi-Lin
authors.initials: SL
authors.lastname: Zhu