Greljo, Admir; Salko, Jakub; Smolkovic, Aleks; Stangl, Peter (2023). SMEFT restrictions on exclusive b → uℓν decays. Journal of High Energy Physics, 2023(11) Springer 10.1007/JHEP11(2023)023
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Exclusive semileptonic b hadron decays (b → uℓν) serve as a sandbox for probing strong and electroweak interactions and for extracting the CKM element Vub. Instead, this work investigates their underexplored potential to reveal new short-distance physics. Utilizing SMEFT as a conduit to chart territory beyond the SM, we demonstrate that substantive new physics contributions in b → uℓν are necessarily linked to correlated effects in rare neutral-current b decays, neutral B meson mixing or high-mass Drell-Yan tails. We find that measurements of the latter processes strongly restrict the allowed deviations in the former. A complete set of tree-level mediators, originating from a perturbative ultraviolet model and matching at dimension 6, is thoroughly explored to support this assertion. As a showcase application, we examine the feasibility of a new physics interpretation of the recent tension in exclusive |Vub| extraction from B → Vℓν where V = (ρ, ω).
Item Type: |
Journal Article (Original Article) |
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Division/Institute: |
10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC) 08 Faculty of Science > Institute of Theoretical Physics |
UniBE Contributor: |
Smolkovic, Aleks |
Subjects: |
500 Science > 530 Physics 500 Science |
ISSN: |
1029-8479 |
Publisher: |
Springer |
Language: |
English |
Submitter: |
Franziska Stämpfli |
Date Deposited: |
04 Dec 2023 13:04 |
Last Modified: |
04 Dec 2023 13:04 |
Publisher DOI: |
10.1007/JHEP11(2023)023 |
ArXiv ID: |
2306.09401 |
BORIS DOI: |
10.48350/189755 |
URI: |
https://boris.unibe.ch/id/eprint/189755 |
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