Global fits to b -> s ll data and signs for lepton non-universality

Abstract

There are some slight tensions with the SM predictions within the latest LHCb measurements. Besides the known anomaly in one angular observable of the rare decay B -> K* mu+ mu-, another small discrepancy recently occurred. The ratio R_K = BR(B+ -> K+ mu+ mu-) / BR(B+ -> K+ e+ e-) in the low-q^2 region has been measured by LHCb showing a 2.6 sigma deviation from the SM prediction. In contrast to the anomaly in the rare decay B -> K* mu+ mu- which is affected by power corrections, the ratio R_K is theoretically rather clean. We analyse all the b -> s ll data with global fits and in particular explore the possibility of breaking of lepton universality. Possible cross-checks with an analysis of the inclusive B -> X_s l+ l- decay are also explored.

15 pages, 11 figures. v2: references added, to appear in JHEP

References in corpus (10)

• Test of lepton universality using $B^{+}\to K^{+}{\ell }^{+}{\ell }^{-}$ decays
• SuperIso v3.0: A program for calculating flavor physics observables in 2HDM and supersymmetry
• Angular Distributions of B -> K ll Decays
• SuperIso: A program for calculating the isospin asymmetry of B -> K* gamma in the MSSM
• New observables in the decay mode anti-B --> anti-K*0 l+ l-
• Logarithmically Enhanced Corrections to the Decay Rate and Forward Backward Asymmetry in anti-B --> X(s) l+ l-
• New physics reach of the decay mode $\bar{B}\to {\bar{K}}^{\ast 0}{\ell }^{+}{\ell }^{-}$
• Radiative and Electroweak Penguin Decays of B Mesons
• Supersymmetric constraints from Bs -> mu+mu- and B -> K* mu+mu- observables
• The Minimal Flavour Violation benchmark in view of the latest LHCb data

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