Global fits to b → sℓℓ data and signs for lepton non-universality

By T. Hurth, Farvah Mahmoudi, S. Neshatpour. 2014

148 citations recorded by the source corpus.

A bstractThere 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*μ+μ−, another small discrepancy recently occurred. The ratio RK = BR(B+ → K+μ+μ−)/BR(B+ → K+e+e−) in the low-q2 region has been measured by LHCb showing a 2.6σ deviation from the SM prediction. In contrast to the anomaly in the rare decay B → K*μ+μ− which is affected by power corrections, the ratio RK is theoretically rather clean. We analyse all the b → sℓℓ 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 → Xsℓ+ℓ− decay are also explored.

Subfields: Artificial Intelligence, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/5f4a21e27b593edebd7de7174e91f53a392ada6f

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Citations in the corpus

Composite leptoquarks and anomalies in B-meson decays (2014, methodology): “Given this, the recent analyses have also made use of this basis [14, 22, 36, 37] .”
Lepton flavor non-universality in B-meson decays from a U(2) flavor model (2015, background): “Global fit results from [13], the blue (light blue) domain corresponds to the 1σ (2σ) region.”
On the anomalies in the latest LHCb data (2016, background): “[32], but consider the following important improvement and updates within the experimental and theoretical inputs:”