CMS-PAS-BPH-22-012 | ||
Test of lepton flavor universality violation in semileptonic B+c meson decays at CMS | ||
CMS Collaboration | ||
31 August 2023 | ||
Abstract: A measurement of the ratio of branching fractions R(J/ψ)=B(B+c→J/ψτ+ντ)/B(B+c→J/ψμ+νμ) in the J/ψ→μ+μ−, τ+→μ+νμνˉτ decay channel is presented. This measurement uses a sample of proton-proton collision data at a center of mass energy of 13 TeV collected by the CMS experiment in 2018 and corresponding to 59.7 fb−1 of integrated luminosity. The measured ratio R(J/ψ)= 0.17 +0.18−0.17 (stat) +0.21−0.22 (syst) +0.19−0.18 (theo) = 0.17 ± 0.33 agrees within 0.3 standard deviations with the value predicted by the standard model of particle physics. | ||
Links:
CDS record (PDF) ;
Physics Briefing ;
CADI line (restricted) ;
These preliminary results are superseded in this paper, Submitted to PRL. The superseded preliminary plots can be found here. |
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Compact Muon Solenoid LHC, CERN |
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