Test of Lepton Universality Using B+→ K+l+l-

By R. Aaij. 2014

165 citations recorded by the source corpus.

Subfields: Atomic and Molecular Physics, and Optics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/c12c1793e6d7b50372e54badc418b0127eff8b4f

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In Atomic and Molecular Physics, and Optics

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Citations in the corpus

Phenomenology of an SU(2) × SU(2) × U(1) model with lepton-flavour non-universality (2016, background): “From the results of the fit, we find the following expected ranges for the different ratios: RK [1, 6] ∈ [0.”
Revisiting the one leptoquark solution to the R(D(∗)) anomalies and its phenomenological implications (2016, methodology): “With this observation, Bauer and Neubert have recently proposed a very simple NP model by extending the SM with a single TeV-scale scalar leptoquark φ transforming as (3,1,−1 3 ) under the SM gauge group, and shown that the anomalies observed in B̄ → D(∗)τ ν̄, B̄ → K̄`+`− [62], as well as the anomal”
B-decay discrepancies after Moriond 2019 (2019, background): “While the updated experimental value is closer to the SM prediction than the Run-1 result [12], the reduced experimental uncertainties imply a tension between theory and experiment at the level of 2.”
Opportunities in Flavour Physics at the HL-LHC and HE-LHC (2018, methodology): “The Run 1 LHCb data have been used to perform the most precise measurements of RK and RK⇤ to-date [5,6] (see Fig.”
Physics of leptoquarks in precision experiments and at particle colliders (2016, methodology): “Recent notable examples include: (i) B → K∗ µ+ µ− decays, where the LHCb Collaboration reported deviations in their measurements of angular observables from the corresponding SM theoretical estimates; (ii) lepton flavor universality ratios of B → K µ+ µ− and B → K e+ e− decays, the most precise LHCb”
Explaining dark matter and B decay anomalies with an Lμ − Lτ model (2016, unknown): “[39] LHCb Collaboration, R. Aaij et. al., Test of lepton universality using B+ → K+`+`− decays, Phys.”
Rare $B$ Decays as Tests of the Standard Model (2016, methodology): “Figure 12: The ratios RK(∗) = Γ[B → K (∗)μ+μ−]/Γ[B → K(∗)μ+μ−] measured by the B-factories [208, 209] and LHCb experiment [259].”
Test of lepton universality in beauty-quark decays (2021, background): “To help overcome the challenge of modelling precisely the different electron and muon reconstruction efficiencies, the branching fractions of B→ K+`+`− decays are measured relative to those of B→ J/ψK decays [110].”
Effective description of general extensions of the Standard Model: the complete tree-level dictionary (2017, methodology): “In this section we illustrate the latter application with a particular example: explaining the recent hints in LHCb data of a violation of lepton flavor universality (LFU) in B-meson decays [63, 64].”
Low-energy effective field theory below the electroweak scale: operators and matching (2017, unknown): “3 b→ s`+`− Decays LHCb has also measured anomalies in B → K∗`+`− and B → K`+`− decays [61, 62],”
A global likelihood for precision constraints and flavour anomalies (2018, background): “Rare B decays Measurements of rare B decays based on the b → s transition are of particular interest as several deviations from SM expectations have been observed there, most notably the anomalies in μ/e universality tests in B → K(∗)`+`− [30,31] and the anomalies in angular observables in B → K∗μ+μ”
Review of lepton universality tests in B decays (2018, methodology): “This value is more than five orders of magnitude larger than the Υ (4S) cross section (∼ 1 nb), however, the ratio of the bb cross section to the total inelastic one is of the order of 1/4 at the Υ (4S) CM energy and about 1/300 at the LHC for a CM energy of 7 TeV.”
Test of lepton universality with B0 → K*0ℓ+ℓ− decays (2017, background): “[6], the K+π−e+e− signal PDF is observed to depend on the number of calorimeter clusters that are added to the dielectron candidate in order to correct for the effects of bremsstrahlung.”
New Physics in $${\varvec{b \rightarrow s \ell ^+ \ell ^-}}$$ confronts new data on lepton universality (2019, methodology): “22 measurements of LHCb only, the most precise ones currently available for these observables.”
B →P and B →V form factors from B-meson light-cone sum rules beyond leading twist (2018, unknown): “These include all exclusive b → sμ+μ− branching ratios [69–71] (with the exception of Λb → Λμ+μ− [72]); the full set of angular observables in B → K∗μ+μ− [73–75]; and most notably the Lepton Flavour Universality (LFU) ratios RK [76] and RK∗ [77].”
Physics beyond colliders at CERN: beyond the Standard Model working group report (2019, background): “A Zμ model gauging the Lμ−Lτ lepton number could also explain the hints of LFU violations in RK and RK∗ ratios observed by LHCb [61, 62].”
B → K∗ℓ+ℓ− decays at large recoil in the Standard Model: a theoretical reappraisal (2015, background): “Of course, there might be other measurements, such as RK [78], hinting at possible NP contributions which may well play a role also in B → K∗`+`−.”