| Article | |
| Report number | arXiv:2306.09401 ; CERN-TH-2023-111 |
| Title | SMEFT restrictions on exclusive b → uℓν decays |
| Related title | SMEFT Restrictions On Exclusive $b \to u \ell \nu$ Decays |
| Author(s) | Greljo, Admir (Basel U.) ; Salko, Jakub (Basel U.) ; Smolkovič, Aleks (Basel U. ; U. Bern, AEC) ; Stangl, Peter (CERN) |
| Publication | 2023-11-06 |
| Imprint | 2023-06-15 |
| Number of pages | 42 |
| Note | 42 pages, 9 figures, 3 tables |
| In: | JHEP 2311 (2023) 023 |
| DOI | 10.1007/JHEP11(2023)023 |
| Subject category | hep-lat ; Particle Physics - Lattice ; hep-ex ; Particle Physics - Experiment ; hep-ph ; Particle Physics - Phenomenology |
| Abstract | Exclusive semileptonic $b$ hadron decays ($b \to u \ell \nu$) serve as a sandbox for probing strong and electroweak interactions and for extracting the CKM element $V_{ub}$. 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 $b \to u \ell \nu$ 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 $|V_{ub}|$ extraction from $B \to V \ell \nu$ where $V=(\rho,\omega)$. |
| Copyright/License | publication: © 2023-2025 The Authors (License: CC-BY-4.0), sponsored by SCOAP³ preprint: (License: CC BY 4.0) |
Corresponding record in: Inspire
Záznam vytvorený 2023-06-20, zmenený 2025-07-12
PDF