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DOE OSTI · 1901773

Radiative semileptonic $ \overline{B} $ decays

Papucci, Michele·Trickle, Tanner·Wise, Mark B.
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Abstract

We consider the form factors for the radiative semileptonic decays $ \overline{B} $(v) → D(*)(v')ℓν¯ ℓγ in the kinematic region where the photon momentum, k, is small enough that heavy quark symmetry (HQS) can be applied without the radiated photon changing the heavy quark velocity (i.e., v(') ∙ k < m (b,c) ). We find that HQS is remarkably powerful, leaving only four new undetermined form factors at leading order in 1/m (b,c) . In addition, one of them is fixed in terms of the leading order Isgur-Wise function in the kinematic region, v(') ∙ k < Λ QCD .

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72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDSChiral LagrangiansEffective Field TheoriesHeavy Quark PhysicsNonperturbative Effects

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Papucci, Michele, Trickle, Tanner, Wise, Mark B.. 2022-02-07. Radiative semileptonic $ \overline{B} $ decays. https://doi.org/10.1007/jhep02(2022)043

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