SMEFT restrictions on exclusive b → uℓν decays
Jun 15, 2023
42 pages
Published in:
- JHEP 11 (2023) 023
- Published: Nov 6, 2023
e-Print:
- 2306.09401 [hep-ph]
Report number:
- CERN-TH-2023-111
View in:
Citations per year
Abstract: (Springer)
Exclusive semileptonic b hadron decays (b → uℓν) serve as a sandbox for probing strong and electroweak interactions and for extracting the CKM element V. 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 |V| extraction from B → Vℓν where V = (ρ, ω).Note:
- 42 pages, 9 figures, 3 tables
- Semi-Leptonic Decays
- SMEFT
- Specific BSM Phenomenology
- new physics
- effective field theory
- operator: dimension: 6
- operator: flavor changing
- bottom: semileptonic decay
- B0: semileptonic decay
- decay: flavor changing
References(130)
Figures(20)
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