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2022

Test of lepton universality in $b \rightarrow s \ell^+ \ell^-$ decays

LHCb collaboration, Aaij, R., Abdelmotteleb, A. S. W. et al.

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The first simultaneous test of muon-electron universality using $B^{+}\rightarrow K^{+}\ell^{+}\ell^{-}$ and $B^{0}\rightarrow K^{*0}\ell^{+}\ell^{-}$ decays is performed, in two ranges of the dilepton invariant-mass squared, $q^{2}$.

The analysis uses beauty mesons produced in proton-proton collisions collected with the LHCb detector between 2011 and 2018, corresponding to an integrated luminosity of 9 $\mathrm{fb}^{-1}$.
Each of the four lepton universality measurements reported is either the first in the given $q^{2}$ interval or supersedes previous LHCb measurements.
The results are compatible with the predictions of the Standard Model.

Test of lepton universality in $b \rightarrow s \ell^+ \ell^-$ decays · Around

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