not repeat them here. This model has ingredients common to many quark potential models [@Radford:2009bs; @Ebert:1997nk; @Ebert:2009ua; @zeng95; @Gupta:1994mw]. Almost all such models are based on some variant of the Coulomb plus linear potential expected from QCD and relativistic effects are often included at some level. The relativized quark model has been reasonably successful in describing most known mesons. However in recent years, starting with the discovery of the $D_{sJ}(2317)$ [@Aubert:2003fg; @Besson:2003cp; @Krokovny:2003zq] and $X(3872)$ states [@Choi:2003ue], an increasing number of states have been observed that do not fit into this picture [@Godfrey:2008nc; @Godfrey:2009qe; @Braaten:2013oba; @DeFazio:2012sg] pointing to the need to include physics which has hitherto been neglected such as coupled channel effects [@Eichten:2004uh]. As a consequence of neglecting coupled channel effects and the crudeness of the relativization procedure we do not expect the mass predictions to be accurate to better than $\sim 10-20$ MeV. The mass predictions for this model are shown in Fig. \[Fig1\]. Lattice gauge theory predictions [@Moir:2013ub] for the excited $1^-$ and $3^-$ charm-strange mesons are given in Table \[tab:models\] for comparison. See also Ref. [@Mohler:2011ke] and [@Bali:2011dc].

For the case of a quark and antiquark of unequal mass, charge conjugation parity is no longer a 