Lepton flavor violation in B decays?
Glashow, Sheldon L.
Lane, Kenneth D.
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Citation (published version)Sheldon L Glashow, Diego Guadagnoli, Kenneth Lane. 2015. "Lepton Flavor Violation in B Decays?." PHYSICAL REVIEW LETTERS, Volume 114, Issue 9, 4 pp. https://doi.org/10.1103/PhysRevLett.114.091801
The LHCb Collaboration’s measurement of RK=B(B+→K+μ+μ−)/B(B+→K+e+e−) lies 2.6σ below the Standard Model prediction. Several groups suggest this deficit to result from new lepton nonuniversal interactions of muons. But nonuniversal leptonic interactions imply lepton flavor violation in B decays at rates much larger than are expected in the Standard Model. A simple model shows that these rates could lie just below current limits. An interesting consequence of our model, that B(Bs→μ+μ−)exp/B(Bs→μ+μ−)SM≅RK≅0.75, is compatible with recent measurements of these rates. We stress the importance of searches for lepton flavor violations, especially for B→Kμe, Kμτ, and Bs→μe, μτ.