Bouchard, C. , Lepage, G. P., Monahan, C., Na, H. and Shigemitsu, J. (2013) Standard model predictions for B→Kℓ+ℓ−with form factors from lattice QCD. Physical Review Letters, 111(16), (doi: 10.1103/PhysRevLett.111.162002)
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Abstract
We calculate, for the first time using unquenched lattice QCD form factors, the standard model differential branching fractions dℬ/dq2(B→Kℓ+ℓ−) for ℓ=e, μ, τ and compare with experimental measurements by Belle, BABAR, CDF, and LHCb. We report on ℬ(B→Kℓ+ℓ−) in q2 bins used by experiment and predict ℬ(B→Kτ+τ−)=(1.41±0.15)×10−7. We also calculate the ratio of branching fractions Rμe=1.00029(69) and predict Rτℓ=1.176(40), for ℓ=e, μ. Finally, we calculate the “flat term” in the angular distribution of the differential decay rate Fe,μ,τH in experimentally motivated q2 bins.
Item Type: | Articles |
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Status: | Published |
Refereed: | Yes |
Glasgow Author(s) Enlighten ID: | Bouchard, Dr Chris |
Authors: | Bouchard, C., Lepage, G. P., Monahan, C., Na, H., and Shigemitsu, J. |
College/School: | College of Science and Engineering > School of Physics and Astronomy |
Journal Name: | Physical Review Letters |
Publisher: | American Physical Society |
ISSN: | 0031-9007 |
ISSN (Online): | 1550-2368 |
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