Tests of lepton universality in $B^0\to K^0_S \ell^+ \ell^-$ and $B^+\to K^{*+} \ell^+ \ell^-$ decays where $\ell$ is either an electron or a muon are presented. The differential branching fractions of $B^0\to K^0_S e^+ e^-$ and $B^+\to K^{*+} e^+ e^-$ decays are measured in intervals of the dilepton invariant mass squared. The measurements are performed using proton-proton collision data recorded by the LHCb experiment, corresponding to an integrated luminosity of $9\, \mathrm{fb}^{-1}$. The results are consistent with the Standard Model and previous tests of lepton universality in related decay modes. The first observation of $B^0 \to K^0_S e^+ e^-$ and $B^+ \to K^{*+} e^+ e^-$ decays is reported.Comment: All figures and tables, along wit...
A measurement of the ratio of branching fractions of the decays B^+→K^+μ^+μ^- and B^+→K^+e^+e^- is p...
Tests of lepton universality in B^{0}→K_{S}^{0}ℓ^{+}ℓ^{-} and B^{+}→K^{*+}ℓ^{+}ℓ^{-} decays where ℓ ...
A test of lepton universality, performed by measuring the ratio of the branching fractions of the B-...
Tests of lepton universality in $B^0\to K^0_S \ell^+ \ell^-$ and $B^+\to K^{*+} \ell^+ \ell^-$ decay...
Tests of lepton universality in B0→K0Sℓ+ℓ− and B+→K*+ℓ+ℓ− decays where ℓ is either an electron or a ...
Tests of lepton universality in B0 → K0S ℓ+ ℓ− and B+ → K*+ ℓ+ ℓ− decays where ℓ is either an electr...
Tests of lepton universality in B0→K0Sℓ+ℓ− and B+→K*+ℓ+ℓ− decays where ℓ is either an electron or a ...
A measurement of the ratio of the branching fractions of the B+ -> K+mu(+)mu(-) and B+ -> K(+)...
A test of lepton universality, performed by measuring the ratio of the branching fractions of the $B...
A test of lepton universality, performed by measuring the ratio of the branching fractions of the B0...
A measurement of the ratio of branching fractions of the decays B+ -> K+mu(+)mu(-) and B+ -> K...
A measurement of the ratio of branching fractions of the decays B+ -> K+mu(+)mu(-) and B+ -> K...
A test of lepton universality, performed by measuring the ratio of the branching fractions of the $B...
Tests of lepton universality in $B^0\to K^0_S \ell^+ \ell^-$ and $B^+\to K^{*+}\ell^+\ell^-$ decays ...
A measurement of the ratio of branching fractions of the decays B^+→K^+μ^+μ^- and B^+→K^+e^+e^- is p...
Tests of lepton universality in B^{0}→K_{S}^{0}ℓ^{+}ℓ^{-} and B^{+}→K^{*+}ℓ^{+}ℓ^{-} decays where ℓ ...
A test of lepton universality, performed by measuring the ratio of the branching fractions of the B-...
Tests of lepton universality in $B^0\to K^0_S \ell^+ \ell^-$ and $B^+\to K^{*+} \ell^+ \ell^-$ decay...
Tests of lepton universality in B0→K0Sℓ+ℓ− and B+→K*+ℓ+ℓ− decays where ℓ is either an electron or a ...
Tests of lepton universality in B0 → K0S ℓ+ ℓ− and B+ → K*+ ℓ+ ℓ− decays where ℓ is either an electr...
Tests of lepton universality in B0→K0Sℓ+ℓ− and B+→K*+ℓ+ℓ− decays where ℓ is either an electron or a ...
A measurement of the ratio of the branching fractions of the B+ -> K+mu(+)mu(-) and B+ -> K(+)...
A test of lepton universality, performed by measuring the ratio of the branching fractions of the $B...
A test of lepton universality, performed by measuring the ratio of the branching fractions of the B0...
A measurement of the ratio of branching fractions of the decays B+ -> K+mu(+)mu(-) and B+ -> K...
A measurement of the ratio of branching fractions of the decays B+ -> K+mu(+)mu(-) and B+ -> K...
A test of lepton universality, performed by measuring the ratio of the branching fractions of the $B...
Tests of lepton universality in $B^0\to K^0_S \ell^+ \ell^-$ and $B^+\to K^{*+}\ell^+\ell^-$ decays ...
A measurement of the ratio of branching fractions of the decays B^+→K^+μ^+μ^- and B^+→K^+e^+e^- is p...
Tests of lepton universality in B^{0}→K_{S}^{0}ℓ^{+}ℓ^{-} and B^{+}→K^{*+}ℓ^{+}ℓ^{-} decays where ℓ ...
A test of lepton universality, performed by measuring the ratio of the branching fractions of the B-...