$1/m$ Corrections for Orbitally Excited Heavy Mesons and the $1/2$ - $3/2$ Puzzle

  title={\$1/m\$ Corrections for Orbitally Excited Heavy Mesons and the \$1/2\$ - \$3/2\$ Puzzle},
  author={Rebecca Klein and Thomas Mannel and Farnoush Shahriaran and Danny van Dyk},
  journal={Physical Review D},
We reinvestigate the effects of the $1/{m}_{c}$ corrections on the spectrum of the lowest orbitally excited $D$-meson states. We argue that one should expect the $1/{m}_{c}$ corrections to induce a significant mixing between the two lowest lying ${1}^{+}$ states. We discuss the implications of this mixing and compute its effect on the semileptonic decays $B\ensuremath{\rightarrow}{D}^{**}\ensuremath{\ell}\overline{\ensuremath{\nu}}$ and the strong ${D}^{**}$ decays. 

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