Regge-Like Mass Relation of Singly Heavy Hadrons

We propose a general Regge-like mass relation to describe the spectra of singly heavy hadrons with the slope ratio π : 2 between radial and orbital Regge trajectories. The hadron mass shift M → M −MQ + ksμlQ with the heavy quark mass MQ and the reduced mass of heavy-light systems μlQ are taken into account. The relation is successfully tested against the observed spin-averaged masses of singly heavy mesons and baryons in their radially and orbitally excited states. Some new predictions are made for more excited states.