Radiative leptonic decays of<b><i>B</i></b>mesons in QCD
Radiative leptonic decays of<b><i>B</i></b>mesons in QCD
We compute the form factors parametrizing radiative leptonic decays of heavy mesons ${B}^{+}\ensuremath{\rightarrow}\ensuremath{\gamma}{e}^{+}\ensuremath{\nu}$ for photon energies much larger than ${\ensuremath{\Lambda}}_{\mathrm{QCD}},$ where perturbative QCD methods for exclusive processes can be combined with the heavy quark effective theory. The form factors can be reliably obtained in this region in an expansion in …