more lepton flavor violating observables for lhcb's run 2
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2016
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Abstract
The RK measurement by LHCb suggests non-standard lepton non-universality (LNU) to occur in b→sℓ+ℓ− transitions, with effects in muons rather than electrons. A number of other measurements of b→sℓ+ℓ− transitions by LHCb and B-factories display disagreement with the SM predictions and, remarkably, these discrepancies are consistent in magnitude and sign with the RK effect. Non-standard LNU suggests non-standard lepton flavor violation (LFV) as well, for example in B→Kℓℓ′ and Bs→ℓℓ′. There are good reasons to expect that the new effects may be larger for generations closer to the third one. In this case, the Bs→μe decay may be the most difficult to reach experimentally. We propose and study in detail the radiative counterpart of this decay, namely Bs→μeγ, whereby the chiral-suppression factor is replaced by a factor of order α/π. A measurement of this mode would be sensitive to the same physics as the purely leptonic LFV decay and, depending on experimental efficiencies, it may be more accessible. A realistic expectation is a factor of two improvement in statistics for either of the Bd,s modes.
| Reference Key |
guadagnoli2016physicsmore
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|---|---|
| Authors | ;Diego Guadagnoli;Dmitri Melikhov;Méril Reboud |
| Journal | ACS chemical biology |
| Year | 2016 |
| DOI |
10.1016/j.physletb.2016.07.028
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