CMS observes η → μ⁺μ⁻e⁺e⁻ for the first time and measures its branching fraction as (2.4 ± 0.8) × 10^{-6}.
Application of Kalman filtering to track and vertex fitting
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First evidence for non-zero φ_s in B_s^0 → J/ψ φ decays at 3.2σ from CMS 13 TeV data combined with prior 8 TeV result.
Suppression of recoil jet yields and intra-jet broadening is observed in central Ru+Ru and Zr+Zr collisions, indicating medium-induced partonic energy loss.
The CMS muon detector after upgrades performs to design specifications or better in 13 TeV collisions, with measurements of resolution, efficiency, and timing matching simulations.
citing papers explorer
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Observation of the rare decay $\eta$ $\to$ $\mu^+\mu^-$e$^+$e$^-$
CMS observes η → μ⁺μ⁻e⁺e⁻ for the first time and measures its branching fraction as (2.4 ± 0.8) × 10^{-6}.
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First evidence for mixing-induced $CP$ violation in B$^0_\mathrm{s}$ $\to$ J/$\psi\,\phi$(1020) decays in pp collisions at $\sqrt{s} = $ 13 TeV
First evidence for non-zero φ_s in B_s^0 → J/ψ φ decays at 3.2σ from CMS 13 TeV data combined with prior 8 TeV result.
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Measurements of jet quenching with semi-inclusive hadron-jet correlations in Ru+Ru and Zr+Zr collisions at $\sqrt{s_\mathrm{NN}}=200$ GeV
Suppression of recoil jet yields and intra-jet broadening is observed in central Ru+Ru and Zr+Zr collisions, indicating medium-induced partonic energy loss.
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Performance of the CMS muon detector and muon reconstruction with proton-proton collisions at $\sqrt{s}=$ 13 TeV
The CMS muon detector after upgrades performs to design specifications or better in 13 TeV collisions, with measurements of resolution, efficiency, and timing matching simulations.