DsJ(2860) from the semileptonic decays of Bs mesons

In the framework of heavy quark effective theory, the leading-order Isgur-Wise form factors relevant to semileptonic decays of the ground state (b) over bars meson B-s into orbitally excited D-wave (c) over bars mesons, including the newly observed narrow D-s1* (2860) and D-s3(*)(2860) states by the LHCb Collaboration, are calculated with the QCD sum rule method. With these universal form factors, the decay rates and branching ratios are estimated. We find that the decay widths are Gamma(B-s -> D-s1*l (v) over bar) = 1.25(-0.60)(+0.80) x 10(-19) GeV, Gamma(B-s -> D-s2'l (v) over bar) = 1.49(-0.73)(+0.97) x 10(-19) Gev, Gamma(B-s -> D-s3*l (v) over bar) = 1.52(-0.31)(+0.35) x 10(-16) Gev. The corresponding branching ratios are B(Bs -> D-s1*l (v) over bar) = 2.85(-1.36)(+1.82) x 10(-7), B(B-s -> D-s2'l (v) over bar) = 3.40(-1.66)(+2.21) x 10(-7) , B(B-s -> D(s2)l (v) over bar) = 1.02(-0.21)(+0.24) x 10(-4,) and B(B-s -> D-s3*l (v) over bar) = 3.46(-0.70)(+0.80) x 10(-4.) The decay widths and branching ratios of corresponding B-s* semileptonic processes are also predicted.