$\bf{
4.121 \pm0.100}$
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OUR EVALUATION
$~~$(Produced by HFLAV) with ${{\mathit \rho}^{2}}=1.128$ $\pm0.033$ and a correlation 0.747. The fitted ${{\mathit \chi}^{2}}$ is 4.8 for 8 degrees of freedom.
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$\bf{
4.17 \pm0.08}$
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OUR AVERAGE
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$4.109$ $\pm0.116$ |
1 |
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BABR |
$4.229$ $\pm0.137$ |
2 |
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BELL |
$4.23$ $\pm0.19$ $\pm0.14$ |
3 |
|
BABR |
$4.31$ $\pm0.08$ $\pm0.23$ |
4 |
|
BABR |
$4.16$ $\pm0.47$ $\pm0.37$ |
5 |
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CLE2 |
$2.78$ $\pm0.68$ $\pm0.65$ |
6 |
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ALEP |
• • • We do not use the following data for averages, fits, limits, etc. • • • |
$4.11$ $\pm0.44$ $\pm0.52$ |
7 |
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BELL |
$3.37$ $\pm0.44$ ${}^{+0.72}_{-0.49}$ |
8 |
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CLE2 |
1
Obtained from a 2D fit to the combined ${{\mathit B}}$ $\rightarrow$ ${{\overline{\mathit D}}}{{\mathit \ell}^{+}}{{\mathit \nu}_{{{{{\mathit \ell}}}}}}$ sample with a model-independent parametrization according to Boyd-Grinstein-Lebed (BGL), in which a hadronic decay of the second ${{\mathit B}}$ meson is fully reconstructed.
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2
Obtained from a fit to the combined partially reconstructed ${{\mathit B}}$ $\rightarrow$ ${{\overline{\mathit D}}}{{\mathit \ell}}{{\mathit \nu}_{{{{{\mathit \ell}}}}}}$ sample while tagged by the other fully reconstructed ${{\mathit B}}$ meson in the event. Also reports fitted $\rho {}^{2}$ = $1.09$ $\pm0.05$.
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3
Obtained from a fit to the combined ${{\mathit B}}$ $\rightarrow$ ${{\overline{\mathit D}}}{{\mathit \ell}^{+}}{{\mathit \nu}_{{{{{\mathit \ell}}}}}}$ sample in which a hadronic decay of the second ${{\mathit B}}$ meson is fully reconstructed and $\rho {}^{2}$ = $1.20$ $\pm0.09$ $\pm0.04$.
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4
Obtained from a global fit to ${{\mathit B}}$ $\rightarrow$ ${{\mathit D}^{(*)}}{{\mathit \ell}}{{\mathit \nu}_{{{{{\mathit \ell}}}}}}$ events, with reconstructed ${{\mathit D}^{0}}{{\mathit \ell}}$ and ${{\mathit D}^{+}}{{\mathit \ell}}$ final states and $\rho {}^{2}$ = $1.20$ $\pm0.04$ $\pm0.07$.
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5
BARTELT 1999: measured using both exclusive reconstructed ${{\mathit B}^{0}}$ $\rightarrow$ ${{\mathit D}^{-}}{{\mathit \ell}^{+}}{{\mathit \nu}}$ and ${{\mathit B}^{+}}$ $\rightarrow$ ${{\mathit D}^{0}}{{\mathit \ell}^{+}}{{\mathit \nu}}$ samples.
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6
BUSKULIC 1997: measured using exclusively reconstructed ${{\mathit D}^{\pm}}$ with a $\mathit a{}^{2}=-0.05$ $\pm0.53$ $\pm0.38$. The statistical correlation is $0.99$.
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7
Using the missing energy and momentum to extract kinematic information about the undetected neutrino in the ${{\mathit B}^{0}}$ $\rightarrow$ ${{\mathit D}^{-}}{{\mathit \ell}^{+}}{{\mathit \nu}}$ decay.
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8
ATHANAS 1997: measured using both exclusive reconstructed ${{\mathit B}^{0}}$ $\rightarrow$ ${{\mathit D}^{-}}{{\mathit \ell}^{+}}{{\mathit \nu}}$ and ${{\mathit B}^{+}}$ $\rightarrow$ ${{\mathit D}^{0}}{{\mathit \ell}^{+}}{{\mathit \nu}}$ samples with a $\rho {}^{2}=0.59$ $\pm0.22$ $\pm0.12{}^{+0.59}_{-0}$. They report their experiment's uncertainties $\pm{}0.0044$ $\pm0.0048$ ${}^{+0.0053}_{-0.0012}$, where the first error is statistical, the second is systematic, and the third is the uncertainty due to the form factor model variations. We combine the last two in quadrature.
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