The masses of $D_{sj}^{\ast }$(2317) and $D_{sj}^{\ast }$(2463) in the MIT bag model

The masses of the $D_{sj}^{\ast }$(2317)and $D_{sj}^{\ast }$(2463) were found in the MIT bag model in a reasonable agreement with the experimental values. The spectrum of $0^{\pm },1^{\pm }$ for $D$ and $B$ mesons is presented. The equalities between the mass splittings $(1^+ - 1^-)(c\bar{q})\approx (1^+ - 1^-)(c\bar{s})$and$(0^+ - 0^-)(c\bar{q})\approx (0^+ - 0^-)(c\bar{s})$,where$q=u, d$areconfirmeddespiteofthefactthat$SU(3)_L\times SU(3)_R$ chiral symmetry is broken by the non-zero strange quark mass.