Angular analysis of the B0 → K⁎(892)0μ+μ− decay in proton-proton collisions at <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.svg"> <mml:msqrt> <mml:mrow> <mml:mi>s</mml:mi> </mml:mrow> </mml:msqrt> <mml:mo linebreak="goodbreak" linebreakstyle="after">=</mml:mo> <mml:mn>13</mml:mn> <mml:mspace width="0.2em"/> <mml:mtext>TeV</mml:mtext> </mml:math>

A full set of optimized observables is measured in an angular analysis of the decay B 0 → K ⁎ ( 892 ) 0 μ + μ − using a sample of proton-proton collisions at s = 13 TeV , collected with the CMS detector at the LHC, corresponding to an integrated luminosity of 140 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 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.

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