Angular analysis of the B0 → K⁎(892)0μ+μ− decay in proton-proton collisions at s=13TeV

Abstract

A full set of optimized observables is measured in an angular analysis of the decay $B^0\to K^{⁎}{\left(892\right)}^0{\mu }^{+}{\mu }^{-}$ using a sample of proton-proton collisions at $\sqrt{s}=13\text{TeV}$, collected with the CMS detector at the LHC, corresponding to an integrated luminosity of 140 ${\text{fb}}^{-1}$. The analysis is performed in six bins of the squared invariant mass of the dimuon system, $q^2$, over the range $1.1<q^2<16{\text{GeV}}^2$. The results are among the most precise experimental measurements of the angular observables for this decay and are compared to a variety of predictions based on the standard model. Some of these predictions exhibit tension with the measurements.