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Volume 352 - XXVII International Workshop on Deep-Inelastic Scattering and Related Subjects (DIS2019) - Working Group 5: Physics with Heavy Flavours
$B$-meson light-cone distribution amplitudes and radiative leptonic decay
Y. Ji
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Pre-published on: 2019 July 18
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We present the recent developments of $B$-meson light-cone distribution amplitudes (LCDAs) including their definition, classification, evolution, equations of monition (EOMs), and modeling. By making use of these recent developments, one particular decay channel $B\to\gamma\ell\nu_\ell$ is discussed in detail with the most accurate theory predication to date for its branching ratio which has been used to extract the value of $\lambda_B$ --- the most important $B$-meson parameter in exclusive decays.
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