Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: $B\to D \ell \nu_\ell$ form factors beyond leading power and extraction
  of $|V_{cb}|$ and $R(D)$   We investigate the subleading-power corrections to the exclusive $B\to D \ell
\nu_\ell$ form factors at ${\cal O} (\alpha_s^0)$ in the light-cone sum rules
(LCSR) framework by including the two- and three-particle higher-twist
contributions from the $B$-meson light-cone distribution amplitudes up to the
twist-six accuracy, by taking into account the subleading terms in expanding
the hard-collinear charm-quark propagator, and by evaluating the hadronic
matrix element of the subleading effective current $\bar q \, \gamma_{\mu} \, i
\not\!\!{D}_\perp / (2 \, m_b) \, h_v$. Employing further the available
leading-power results for the semileptonic $B \to D$ form factors at the
next-to-leading-logarithmic level and combining our improved LCSR predictions
with the recent lattice determinations, we then carry out a comprehensive
phenomenological analysis on the semi-leptonic $B\to D \ell \nu_\ell$ decay. We
extract $|V_{cb}| = \big(40.3^{+0.9}_{-0.8} {\big |_{\rm th}}\,\,
{}^{+1.4}_{-1.4} {\big |_{\rm exp}} \big) \times 10^{-3}$ ($|V_{cb}| =
\big(41.0^{+0.9}_{-0.8} {\big |_{\rm th}}\,\, {}^{+1.0}_{-1.0} {\big |_{\rm
exp}} \big) \times 10^{-3}$) using the BaBar (Belle) experimental data, and
particularly obtain for the gold-plated ratio $R(D) = 0.305 \pm 0.007$.

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The categories of this paper are: math
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The categories of this paper are: hep-lat
37
The categories of this paper are: supr-con
36
The categories of this paper are: cmp-lg
16
The categories of this paper are: stat
23
The categories of this paper are: solv-int
18
The categories of this paper are: econ
10
The categories of this paper are: q-bio
7
The categories of this paper are: hep-th
3
The categories of this paper are: physics
35
The categories of this paper are: mtrl-th
26
The categories of this paper are: bayes-an
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The categories of this paper are: cond-mat
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The categories of this paper are: hep-ex
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The categories of this paper are: nucl-ex
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The categories of this paper are: adap-org