Published February 2022
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Radiative semileptonic B̅ decays
Abstract
We consider the form factors for the radiative semileptonic decays B̅(v) → D(*)(v′)ℓν̅_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).
Additional Information
© 2022 The Authors. This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited. Article funded by SCOAP3. Received: November 30, 2021; Accepted: January 8, 2022; Published: February 7, 2022. We would like to thank Florian Bernlochner for discussions and Zoltan Ligeti and Dean Robinson for comments on the paper. This work is supported by the U.S. Department of Energy, Office of Science, Office of High Energy Physics, under Award Number DESC0011632 and by the Walter Burke Institute for Theoretical Physics.Attached Files
Published - Papucci2022_Article_RadiativeSemileptonicBOverline.pdf
Submitted - 2110.13154.pdf
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Additional details
Identifiers
- Eprint ID
- 111689
- Resolver ID
- CaltechAUTHORS:20211029-211331383
Related works
- Describes
- https://arxiv.org/abs/2110.13154 (URL)
Funding
- Department of Energy (DOE)
- DE-SC0011632
- Walter Burke Institute for Theoretical Physics, Caltech
- SCOAP3
Dates
- Created
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2021-11-02Created from EPrint's datestamp field
- Updated
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2022-02-11Created from EPrint's last_modified field