SMEFT restrictions on exclusive b → uℓν decays
Abstract Exclusive semileptonic b hadron decays (b → uℓν) 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 c...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2023-11-01
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| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/JHEP11(2023)023 |
| _version_ | 1827277408734019584 |
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| author | Admir Greljo Jakub Salko Aleks Smolkovič Peter Stangl |
| author_facet | Admir Greljo Jakub Salko Aleks Smolkovič Peter Stangl |
| author_sort | Admir Greljo |
| collection | DOAJ |
| description | Abstract Exclusive semileptonic b hadron decays (b → uℓν) 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 → 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 ub | extraction from B → Vℓν where V = (ρ, ω). |
| first_indexed | 2024-03-11T11:08:17Z |
| format | Article |
| id | doaj.art-37e2942a56e7469481ffdba677052b70 |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-04-24T07:20:39Z |
| publishDate | 2023-11-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-37e2942a56e7469481ffdba677052b702024-04-21T11:04:59ZengSpringerOpenJournal of High Energy Physics1029-84792023-11-0120231114210.1007/JHEP11(2023)023SMEFT restrictions on exclusive b → uℓν decaysAdmir Greljo0Jakub Salko1Aleks Smolkovič2Peter Stangl3Department of Physics, University of BaselDepartment of Physics, University of BaselDepartment of Physics, University of BaselTheoretical Physics Department, CERNAbstract Exclusive semileptonic b hadron decays (b → uℓν) 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 → 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 ub | extraction from B → Vℓν where V = (ρ, ω).https://doi.org/10.1007/JHEP11(2023)023Semi-Leptonic DecaysSMEFTSpecific BSM Phenomenology |
| spellingShingle | Admir Greljo Jakub Salko Aleks Smolkovič Peter Stangl SMEFT restrictions on exclusive b → uℓν decays Journal of High Energy Physics Semi-Leptonic Decays SMEFT Specific BSM Phenomenology |
| title | SMEFT restrictions on exclusive b → uℓν decays |
| title_full | SMEFT restrictions on exclusive b → uℓν decays |
| title_fullStr | SMEFT restrictions on exclusive b → uℓν decays |
| title_full_unstemmed | SMEFT restrictions on exclusive b → uℓν decays |
| title_short | SMEFT restrictions on exclusive b → uℓν decays |
| title_sort | smeft restrictions on exclusive b ulν decays |
| topic | Semi-Leptonic Decays SMEFT Specific BSM Phenomenology |
| url | https://doi.org/10.1007/JHEP11(2023)023 |
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