The role of $D^{\star\star}$ in $B^-\to D_s^+ K^- π^-$

Details The role of $D^{\star\star}$ in $B^-\to D_s^+ K^- π^-$ The role of $D^{\star\star}$ in $B^-\to D_s^+ K^- π^-$

2006-11-07

arxiv.org/abs/hep-ph/0611085v2

Phys.Lett.B647:164-172,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

Version to appear in Physics Letters B

Scientific paper

10.1016/j.physletb.2007.02.018

The BaBar collaboration has recently reported the observation of the decay mode $B^-\to D_s^+ K^- \pi^-$. We investigate the role played by the $D^{\star\star}$ resonances in this decay mode using HQET. Although these resonances cannot appear as physical intermediate states in this reaction, their mass is very close to the $D_s^+ K^-$ production threshold and may, therefore, play a prominent role. We pursue this possibility to extract information on the properties of the strong $D^{\star\star} D M$ couplings. As a byproduct of this analysis we point out that future super-$B$ factories may be able to measure the $D_0^0 D^\star \gamma$ radiative coupling through the reaction $B^-\to D^\star \gamma \pi^-$.

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