Standard Model predictions for lepton flavour universality ratios of inclusive semileptonic B decays

A bstract We present Standard Model predictions for lepton flavour universality ratios of inclusive B → X ( c ) ℓ ν ¯ ℓ . For the ℓ = μ, e , these ratios are very close to unity as expected. For the τ mode, we update the SM prediction for the branching ratio including power-corrections in the heavy-...

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Bibliographic Details
Published in:The journal of high energy physics 2022-11, Vol.2022 (11), p.7-14, Article 7
Main Authors: Rahimi, Muslem, Vos, K. Keri
Format: Article
Language:English
Subjects:
Bottom Quarks
Classical and Quantum Gravitation
Elementary Particles
Flavor (particle physics)
High energy physics
Leptons
Physics
Physics and Astronomy
Quantum Field Theories
Quantum Field Theory
Quantum Physics
Quarks
Ratios
Regular Article - Theoretical Physics
Relativity Theory
Semi-Leptonic Decays
Standard model (particle physics)
String Theory
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Summary:A bstract We present Standard Model predictions for lepton flavour universality ratios of inclusive B → X ( c ) ℓ ν ¯ ℓ . For the ℓ = μ, e , these ratios are very close to unity as expected. For the τ mode, we update the SM prediction for the branching ratio including power-corrections in the heavy-quark expansion up to 1 / m b 3 . These inclusive ratios serve as an important cross-check of the exclusive B → D (*) ℓ ν ¯ ℓ modes, in which tensions exists between the predictions and measurements in those modes.
ISSN:1029-8479
1029-8479
DOI:10.1007/JHEP11(2022)007