Looking for D*_sJ mesons in B meson decays

We propose that the search of the B→D*_sJM decays, M = D, π, and K, can discriminate the different theoretical postulations for the nature of the recently observed D*_sJ mesons. The ratio of the branching ratios B(B→D*_sJM)/B(B→D(*) _sM)≈1 (0.1) supports that the D*_sJ mesons are quark-antiquark (multiquark) bound states. The Belle measurement of the B→D*_sJD branching ratios seems to indicate an unconventional picture.