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dc.contributor.author
Da Rold, Leandro
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dc.date.available
2024-08-16T14:19:57Z
dc.date.issued
2024-06
dc.identifier.citation
Da Rold, Leandro; The flavor of a minimal composite S1 leptoquark and the b→cτν anomaly; Springer; Journal of High Energy Physics; 6-2024; 1-32
dc.identifier.issn
1029-8479
dc.identifier.uri
http://hdl.handle.net/11336/242672
dc.description.abstract
Several experiments have measured a deviation in B → D(∗) semileptonic decays, that point to new physics at the TeV scale violating lepton flavor universality. A scalar leptoquark S1, with a suitable structure of couplings in flavor space, is known to be able to solve this anomaly modifying b → cτν̄. In the context of composite Higgs models, we consider a theory containing H and S1 as Nambu-Goldstone bosons (NGBs) of a new strongly interacting sector, with ordinary resonances at a scale O(10) TeV. Assuming anarchic partial compositeness of the Standard Model (SM) fermions we calculate the potential of the NGBs that is dominated by the fermions of the third generation, we compute RD(∗) and estimate the corrections to flavor observables by the presence of S1. We find that the SM spectrum and mS1 ∼ TeV can be obtained with a NGB decay constant of order ∼ 5 TeV. We obtain a robust correlation between the main corrections to RD(∗), B K(∗)νν and gτ/gµ , that leads to a sever bound on RD(∗), roughly 2σ belowthe experimental value. Besides the bounds on the flavor observables gτW, BR(τ → µγ) and ∆mBs are saturated, with the first one requiring a coupling between resonances g∗≲ 2, whereas the second one demands mS1 ≳ 1.7 TeV, up to corrections of O(1).
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Springer
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dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Flavor physics
dc.subject
BSM
dc.subject
Composite Higgs
dc.subject
Leptoquarks
dc.subject.classification
Física de Partículas y Campos
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dc.subject.classification
Ciencias Físicas
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
The flavor of a minimal composite S1 leptoquark and the b→cτν anomaly
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2024-08-15T15:30:33Z
dc.journal.pagination
1-32
dc.journal.pais
Italia
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dc.description.fil
Fil: Da Rold, Leandro. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
dc.journal.title
Journal of High Energy Physics
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1007/JHEP06(2024)152
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