Journal
PHYSICAL REVIEW D
Volume 89, Issue 3, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.89.034023
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Funding
- UK Science & Technology Facilities Council (STFC) [ST/G00062X/1]
- ERC Advanced Grant project FLAVOUR [267104]
- STFC [ST/G00062X/1, ST/J000493/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/J000493/1, ST/G00062X/1] Funding Source: researchfish
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We calculate the full two-loop electroweak matching corrections to the operator governing the decay B-q -> l(+)l(-) in the standard model. Their inclusion removes an electroweak scheme and scale uncertainty of about +/- 7% of the branching ratio. Using different renormalization schemes of the involved electroweak parameters, we estimate residual perturbative electroweak and QED uncertainties to be less than +/- 1% at the level of the branching ratio.
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