Semileptonic $B$ Meson Decays Into A Highly Excited Charmed Meson Doublet

Details Semileptonic $B$ Meson Decays Into A Highly Excited Charmed Meson Doublet Semileptonic $B$ Meson Decays Into A Highly Excited Charmed Meson Doublet

2009-06-27

arxiv.org/abs/0906.5046v1

Phys.Rev.D79:117501,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages,2 figures

Scientific paper

10.1103/PhysRevD.79.117501

We study the heavy quark effective theory prediction for semileptonic $B$ decays into an orbital excited $F$-wave charmed doublet, the ($2^{+}$, $3^{+}$) states ($D^{*'}_{2}$, $D_{3}$), at the leading order of heavy quark expansion. The corresponding universal form factor is estimated by using the QCD sum rule method. The decay rates we predict are $\Gamma_{B\to D^{*'}_{2}\ell\overline{\nu}}=1.85\times10^{-19} {GeV}$ and $\Gamma_{B\to D_{3}\ell\overline{\nu}}=1.78\times10^{-19} {GeV}$. The branching ratios are $\mathcal {B}(B\to D_{2}^{*'}\ell\overline{\nu})=4.6\times10^{-7}$ and $\mathcal {B}(B\to D_{3}\ell\overline{\nu})=4.4\times10^{-7}$, respectively.

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