311 research outputs found

    Measurement of the Bs0→Ό+Ό− decay properties and search for the B0â€Żâ†’â€ŻÎŒ+Ό− decay in proton-proton collisions at s=13TeV

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    Measurements are presented of the Bs0→Ό+Ό− branching fraction and effective lifetime, as well as results of a search for the B0→Ό+Ό− decay in proton-proton collisions at s=13TeV at the LHC. The analysis is based on data collected with the CMS detector in 2016–2018 corresponding to an integrated luminosity of 140fb−1. The branching fraction of the Bs0→Ό+Ό− decay and the effective Bs0 meson lifetime are the most precise single measurements to date. No evidence for the B0→Ό+Ό− decay has been found. All results are found to be consistent with the standard model predictions and previous measurements

    Evidence for four-top quark production in proton-proton collisions at s=13TeV